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Finding the Fourth Proportional to 125,184.90, 172,755.16 and 74,883.90

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Solution

The fourth proportional to 125,184.90, 172,755.16 and 74,883.90 is: 103,339.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,184.90 : 172,755.16 = 74,883.90 : x
  2. Step 2: Convert to fraction form
    125,184.90/172,755.16 = 74,883.90/x
  3. Step 3: Cross multiply
    125,184.90x = 172,755.16 × 74,883.90
  4. Step 4: Simplify right side
    125,184.90x = 12,936,580,125.92
  5. Step 5: Solve for x
    x = 12,936,580,125.92/125,184.90
  6. Step 6: Final answer
    x = 103,339.78

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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.