Home / 78,971,899.32-118,508,999.27-42,605,391.69

Finding the Fourth Proportional to 78,971,899.32, 118,508,999.27 and 42,605,391.69

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Solution

The fourth proportional to 78,971,899.32, 118,508,999.27 and 42,605,391.69 is: 63,935,683.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,971,899.32 : 118,508,999.27 = 42,605,391.69 : x
  2. Step 2: Convert to fraction form
    78,971,899.32/118,508,999.27 = 42,605,391.69/x
  3. Step 3: Cross multiply
    78,971,899.32x = 118,508,999.27 × 42,605,391.69
  4. Step 4: Simplify right side
    78,971,899.32x = 5,049,122,332,475,247
  5. Step 5: Solve for x
    x = 5,049,122,332,475,247/78,971,899.32
  6. Step 6: Final answer
    x = 63,935,683.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.