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Finding the Fourth Proportional to 138,503.52, 207,755.28 and 79,298.19

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Solution

The fourth proportional to 138,503.52, 207,755.28 and 79,298.19 is: 118,947.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,503.52 : 207,755.28 = 79,298.19 : x
  2. Step 2: Convert to fraction form
    138,503.52/207,755.28 = 79,298.19/x
  3. Step 3: Cross multiply
    138,503.52x = 207,755.28 × 79,298.19
  4. Step 4: Simplify right side
    138,503.52x = 16,474,617,666.94
  5. Step 5: Solve for x
    x = 16,474,617,666.94/138,503.52
  6. Step 6: Final answer
    x = 118,947.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.