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Finding the Fourth Proportional to 43,754.80, 65,648.40 and 42,134.80

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Solution

The fourth proportional to 43,754.80, 65,648.40 and 42,134.80 is: 63,217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,754.80 : 65,648.40 = 42,134.80 : x
  2. Step 2: Convert to fraction form
    43,754.80/65,648.40 = 42,134.80/x
  3. Step 3: Cross multiply
    43,754.80x = 65,648.40 × 42,134.80
  4. Step 4: Simplify right side
    43,754.80x = 2,766,082,204.32
  5. Step 5: Solve for x
    x = 2,766,082,204.32/43,754.80
  6. Step 6: Final answer
    x = 63,217.80

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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.