Home / 115,074.56-158,780.16-72,691.20

Finding the Fourth Proportional to 115,074.56, 158,780.16 and 72,691.20

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Solution

The fourth proportional to 115,074.56, 158,780.16 and 72,691.20 is: 100,299.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,074.56 : 158,780.16 = 72,691.20 : x
  2. Step 2: Convert to fraction form
    115,074.56/158,780.16 = 72,691.20/x
  3. Step 3: Cross multiply
    115,074.56x = 158,780.16 × 72,691.20
  4. Step 4: Simplify right side
    115,074.56x = 11,541,920,366.59
  5. Step 5: Solve for x
    x = 11,541,920,366.59/115,074.56
  6. Step 6: Final answer
    x = 100,299.50

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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.