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Finding the Fourth Proportional to 147,691.40, 221,393.10 and 84,446.60

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Solution

The fourth proportional to 147,691.40, 221,393.10 and 84,446.60 is: 126,587.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,691.40 : 221,393.10 = 84,446.60 : x
  2. Step 2: Convert to fraction form
    147,691.40/221,393.10 = 84,446.60/x
  3. Step 3: Cross multiply
    147,691.40x = 221,393.10 × 84,446.60
  4. Step 4: Simplify right side
    147,691.40x = 18,695,894,558.46
  5. Step 5: Solve for x
    x = 18,695,894,558.46/147,691.40
  6. Step 6: Final answer
    x = 126,587.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.