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Finding the Fourth Proportional to 81,545.88, 122,337.24 and 28,955.40

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Solution

The fourth proportional to 81,545.88, 122,337.24 and 28,955.40 is: 43,439.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,545.88 : 122,337.24 = 28,955.40 : x
  2. Step 2: Convert to fraction form
    81,545.88/122,337.24 = 28,955.40/x
  3. Step 3: Cross multiply
    81,545.88x = 122,337.24 × 28,955.40
  4. Step 4: Simplify right side
    81,545.88x = 3,542,323,719.10
  5. Step 5: Solve for x
    x = 3,542,323,719.10/81,545.88
  6. Step 6: Final answer
    x = 43,439.64

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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.