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Finding the Fourth Proportional to 72,561.60, 108,712.80 and 59,342.40

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Solution

The fourth proportional to 72,561.60, 108,712.80 and 59,342.40 is: 88,907.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,561.60 : 108,712.80 = 59,342.40 : x
  2. Step 2: Convert to fraction form
    72,561.60/108,712.80 = 59,342.40/x
  3. Step 3: Cross multiply
    72,561.60x = 108,712.80 × 59,342.40
  4. Step 4: Simplify right side
    72,561.60x = 6,451,278,462.72
  5. Step 5: Solve for x
    x = 6,451,278,462.72/72,561.60
  6. Step 6: Final answer
    x = 88,907.61

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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.