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Finding the Fourth Proportional to 57,144.80, 85,660.50 and 28,981.10

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Solution

The fourth proportional to 57,144.80, 85,660.50 and 28,981.10 is: 43,442.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,144.80 : 85,660.50 = 28,981.10 : x
  2. Step 2: Convert to fraction form
    57,144.80/85,660.50 = 28,981.10/x
  3. Step 3: Cross multiply
    57,144.80x = 85,660.50 × 28,981.10
  4. Step 4: Simplify right side
    57,144.80x = 2,482,535,516.55
  5. Step 5: Solve for x
    x = 2,482,535,516.55/57,144.80
  6. Step 6: Final answer
    x = 43,442.89

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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.