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Finding the Fourth Proportional to 123,755.17, 170,752.55 and 75,356.52

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Solution

The fourth proportional to 123,755.17, 170,752.55 and 75,356.52 is: 103,973.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,755.17 : 170,752.55 = 75,356.52 : x
  2. Step 2: Convert to fraction form
    123,755.17/170,752.55 = 75,356.52/x
  3. Step 3: Cross multiply
    123,755.17x = 170,752.55 × 75,356.52
  4. Step 4: Simplify right side
    123,755.17x = 12,867,317,949.13
  5. Step 5: Solve for x
    x = 12,867,317,949.13/123,755.17
  6. Step 6: Final answer
    x = 103,973.98

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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.