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Finding the Fourth Proportional to 56,992.80, 85,489.20 and 15,439.80

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Solution

The fourth proportional to 56,992.80, 85,489.20 and 15,439.80 is: 23,159.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,992.80 : 85,489.20 = 15,439.80 : x
  2. Step 2: Convert to fraction form
    56,992.80/85,489.20 = 15,439.80/x
  3. Step 3: Cross multiply
    56,992.80x = 85,489.20 × 15,439.80
  4. Step 4: Simplify right side
    56,992.80x = 1,319,936,150.16
  5. Step 5: Solve for x
    x = 1,319,936,150.16/56,992.80
  6. Step 6: Final answer
    x = 23,159.70

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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.