Home / 143,403.91-197,902.22-78,878.12

Finding the Fourth Proportional to 143,403.91, 197,902.22 and 78,878.12

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Solution

The fourth proportional to 143,403.91, 197,902.22 and 78,878.12 is: 108,854.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,403.91 : 197,902.22 = 78,878.12 : x
  2. Step 2: Convert to fraction form
    143,403.91/197,902.22 = 78,878.12/x
  3. Step 3: Cross multiply
    143,403.91x = 197,902.22 × 78,878.12
  4. Step 4: Simplify right side
    143,403.91x = 15,610,153,673.52
  5. Step 5: Solve for x
    x = 15,610,153,673.52/143,403.91
  6. Step 6: Final answer
    x = 108,854.45

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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.