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Finding the Fourth Proportional to 65,764.80, 98,687.70 and 28,342.80

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Solution

The fourth proportional to 65,764.80, 98,687.70 and 28,342.80 is: 42,531.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,764.80 : 98,687.70 = 28,342.80 : x
  2. Step 2: Convert to fraction form
    65,764.80/98,687.70 = 28,342.80/x
  3. Step 3: Cross multiply
    65,764.80x = 98,687.70 × 28,342.80
  4. Step 4: Simplify right side
    65,764.80x = 2,797,085,743.56
  5. Step 5: Solve for x
    x = 2,797,085,743.56/65,764.80
  6. Step 6: Final answer
    x = 42,531.65

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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.