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Finding the Fourth Proportional to 99,387.38, 137,154.52 and 56,970.52

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Solution

The fourth proportional to 99,387.38, 137,154.52 and 56,970.52 is: 78,619.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,387.38 : 137,154.52 = 56,970.52 : x
  2. Step 2: Convert to fraction form
    99,387.38/137,154.52 = 56,970.52/x
  3. Step 3: Cross multiply
    99,387.38x = 137,154.52 × 56,970.52
  4. Step 4: Simplify right side
    99,387.38x = 7,813,764,324.75
  5. Step 5: Solve for x
    x = 7,813,764,324.75/99,387.38
  6. Step 6: Final answer
    x = 78,619.28

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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.