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Finding the Fourth Proportional to 72,405.40, 108,618.18 and 22,489.30

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Solution

The fourth proportional to 72,405.40, 108,618.18 and 22,489.30 is: 33,737.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,405.40 : 108,618.18 = 22,489.30 : x
  2. Step 2: Convert to fraction form
    72,405.40/108,618.18 = 22,489.30/x
  3. Step 3: Cross multiply
    72,405.40x = 108,618.18 × 22,489.30
  4. Step 4: Simplify right side
    72,405.40x = 2,442,746,835.47
  5. Step 5: Solve for x
    x = 2,442,746,835.47/72,405.40
  6. Step 6: Final answer
    x = 33,737.08

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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.