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Finding the Fourth Proportional to 64,942.80, 97,414.20 and 42,781.20

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Solution

The fourth proportional to 64,942.80, 97,414.20 and 42,781.20 is: 64,171.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,942.80 : 97,414.20 = 42,781.20 : x
  2. Step 2: Convert to fraction form
    64,942.80/97,414.20 = 42,781.20/x
  3. Step 3: Cross multiply
    64,942.80x = 97,414.20 × 42,781.20
  4. Step 4: Simplify right side
    64,942.80x = 4,167,496,373.04
  5. Step 5: Solve for x
    x = 4,167,496,373.04/64,942.80
  6. Step 6: Final answer
    x = 64,171.80

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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.