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Finding the Fourth Proportional to 60,489.20, 90,720.84 and 18,913.52

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Solution

The fourth proportional to 60,489.20, 90,720.84 and 18,913.52 is: 28,366.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,489.20 : 90,720.84 = 18,913.52 : x
  2. Step 2: Convert to fraction form
    60,489.20/90,720.84 = 18,913.52/x
  3. Step 3: Cross multiply
    60,489.20x = 90,720.84 × 18,913.52
  4. Step 4: Simplify right side
    60,489.20x = 1,715,850,421.76
  5. Step 5: Solve for x
    x = 1,715,850,421.76/60,489.20
  6. Step 6: Final answer
    x = 28,366.23

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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.