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Finding the Fourth Proportional to 221,691.60, 332,648.64 and 103,372.20

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Solution

The fourth proportional to 221,691.60, 332,648.64 and 103,372.20 is: 155,110.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,691.60 : 332,648.64 = 103,372.20 : x
  2. Step 2: Convert to fraction form
    221,691.60/332,648.64 = 103,372.20/x
  3. Step 3: Cross multiply
    221,691.60x = 332,648.64 × 103,372.20
  4. Step 4: Simplify right side
    221,691.60x = 34,386,621,743.81
  5. Step 5: Solve for x
    x = 34,386,621,743.81/221,691.60
  6. Step 6: Final answer
    x = 155,110.17

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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.