Home / 78,001.12-107,641.14-42,191.02

Finding the Fourth Proportional to 78,001.12, 107,641.14 and 42,191.02

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Solution

The fourth proportional to 78,001.12, 107,641.14 and 42,191.02 is: 58,223.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,001.12 : 107,641.14 = 42,191.02 : x
  2. Step 2: Convert to fraction form
    78,001.12/107,641.14 = 42,191.02/x
  3. Step 3: Cross multiply
    78,001.12x = 107,641.14 × 42,191.02
  4. Step 4: Simplify right side
    78,001.12x = 4,541,489,490.56
  5. Step 5: Solve for x
    x = 4,541,489,490.56/78,001.12
  6. Step 6: Final answer
    x = 58,223.39

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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.