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Finding the Fourth Proportional to 125,354.10, 172,978.35 and 68,765.49

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Solution

The fourth proportional to 125,354.10, 172,978.35 and 68,765.49 is: 94,890.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,354.10 : 172,978.35 = 68,765.49 : x
  2. Step 2: Convert to fraction form
    125,354.10/172,978.35 = 68,765.49/x
  3. Step 3: Cross multiply
    125,354.10x = 172,978.35 × 68,765.49
  4. Step 4: Simplify right side
    125,354.10x = 11,894,940,997.14
  5. Step 5: Solve for x
    x = 11,894,940,997.14/125,354.10
  6. Step 6: Final answer
    x = 94,890.72

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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.