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Finding the Fourth Proportional to 221,462.60, 332,193.90 and 81,275.90

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Solution

The fourth proportional to 221,462.60, 332,193.90 and 81,275.90 is: 121,913.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,462.60 : 332,193.90 = 81,275.90 : x
  2. Step 2: Convert to fraction form
    221,462.60/332,193.90 = 81,275.90/x
  3. Step 3: Cross multiply
    221,462.60x = 332,193.90 × 81,275.90
  4. Step 4: Simplify right side
    221,462.60x = 26,999,358,197.01
  5. Step 5: Solve for x
    x = 26,999,358,197.01/221,462.60
  6. Step 6: Final answer
    x = 121,913.85

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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.