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Finding the Fourth Proportional to 125,841.81, 173,622.60 and 71,385

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Solution

The fourth proportional to 125,841.81, 173,622.60 and 71,385 is: 98,489.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,841.81 : 173,622.60 = 71,385 : x
  2. Step 2: Convert to fraction form
    125,841.81/173,622.60 = 71,385/x
  3. Step 3: Cross multiply
    125,841.81x = 173,622.60 × 71,385
  4. Step 4: Simplify right side
    125,841.81x = 12,394,049,301
  5. Step 5: Solve for x
    x = 12,394,049,301/125,841.81
  6. Step 6: Final answer
    x = 98,489.12

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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.