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Finding the Fourth Proportional to 72,421.20, 108,639.90 and 22,500.90

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Solution

The fourth proportional to 72,421.20, 108,639.90 and 22,500.90 is: 33,753.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,421.20 : 108,639.90 = 22,500.90 : x
  2. Step 2: Convert to fraction form
    72,421.20/108,639.90 = 22,500.90/x
  3. Step 3: Cross multiply
    72,421.20x = 108,639.90 × 22,500.90
  4. Step 4: Simplify right side
    72,421.20x = 2,444,495,525.91
  5. Step 5: Solve for x
    x = 2,444,495,525.91/72,421.20
  6. Step 6: Final answer
    x = 33,753.87

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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.