Home / 143,470,915,631.86-197,988,686,946.07-78,365,384,445.78

Finding the Fourth Proportional to 143,470,915,631.86, 197,988,686,946.07 and 78,365,384,445.78

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Solution

The fourth proportional to 143,470,915,631.86, 197,988,686,946.07 and 78,365,384,445.78 is: 108,143,587,849.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,470,915,631.86 : 197,988,686,946.07 = 78,365,384,445.78 : x
  2. Step 2: Convert to fraction form
    143,470,915,631.86/197,988,686,946.07 = 78,365,384,445.78/x
  3. Step 3: Cross multiply
    143,470,915,631.86x = 197,988,686,946.07 × 78,365,384,445.78
  4. Step 4: Simplify right side
    143,470,915,631.86x = 15,515,459,568,443,959,803,904
  5. Step 5: Solve for x
    x = 15,515,459,568,443,959,803,904/143,470,915,631.86
  6. Step 6: Final answer
    x = 108,143,587,849.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.