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Finding the Fourth Proportional to 125,086.40, 172,615.88 and 71,370.44

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Solution

The fourth proportional to 125,086.40, 172,615.88 and 71,370.44 is: 98,489.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,086.40 : 172,615.88 = 71,370.44 : x
  2. Step 2: Convert to fraction form
    125,086.40/172,615.88 = 71,370.44/x
  3. Step 3: Cross multiply
    125,086.40x = 172,615.88 × 71,370.44
  4. Step 4: Simplify right side
    125,086.40x = 12,319,670,621.93
  5. Step 5: Solve for x
    x = 12,319,670,621.93/125,086.40
  6. Step 6: Final answer
    x = 98,489.29

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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.