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Finding the Fourth Proportional to 125,077.82, 172,605.68 and 68,489.20

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Solution

The fourth proportional to 125,077.82, 172,605.68 and 68,489.20 is: 94,514.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,077.82 : 172,605.68 = 68,489.20 : x
  2. Step 2: Convert to fraction form
    125,077.82/172,605.68 = 68,489.20/x
  3. Step 3: Cross multiply
    125,077.82x = 172,605.68 × 68,489.20
  4. Step 4: Simplify right side
    125,077.82x = 11,821,624,938.66
  5. Step 5: Solve for x
    x = 11,821,624,938.66/125,077.82
  6. Step 6: Final answer
    x = 94,514.16

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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.