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Finding the Fourth Proportional to 99,684.70, 137,591.09 and 56,689.29

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Solution

The fourth proportional to 99,684.70, 137,591.09 and 56,689.29 is: 78,246.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,684.70 : 137,591.09 = 56,689.29 : x
  2. Step 2: Convert to fraction form
    99,684.70/137,591.09 = 56,689.29/x
  3. Step 3: Cross multiply
    99,684.70x = 137,591.09 × 56,689.29
  4. Step 4: Simplify right side
    99,684.70x = 7,799,941,202.43
  5. Step 5: Solve for x
    x = 7,799,941,202.43/99,684.70
  6. Step 6: Final answer
    x = 78,246.12

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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.