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Finding the Fourth Proportional to 99,617.58, 137,472.31 and 56,597.15

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Solution

The fourth proportional to 99,617.58, 137,472.31 and 56,597.15 is: 78,104.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,617.58 : 137,472.31 = 56,597.15 : x
  2. Step 2: Convert to fraction form
    99,617.58/137,472.31 = 56,597.15/x
  3. Step 3: Cross multiply
    99,617.58x = 137,472.31 × 56,597.15
  4. Step 4: Simplify right side
    99,617.58x = 7,780,539,979.57
  5. Step 5: Solve for x
    x = 7,780,539,979.57/99,617.58
  6. Step 6: Final answer
    x = 78,104.09

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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.