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Finding the Fourth Proportional to 125,129.76, 172,679.10 and 68,543.16

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Solution

The fourth proportional to 125,129.76, 172,679.10 and 68,543.16 is: 94,589.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,129.76 : 172,679.10 = 68,543.16 : x
  2. Step 2: Convert to fraction form
    125,129.76/172,679.10 = 68,543.16/x
  3. Step 3: Cross multiply
    125,129.76x = 172,679.10 × 68,543.16
  4. Step 4: Simplify right side
    125,129.76x = 11,835,971,179.96
  5. Step 5: Solve for x
    x = 11,835,971,179.96/125,129.76
  6. Step 6: Final answer
    x = 94,589.58

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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.