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Finding the Fourth Proportional to 67,687.50, 101,531.25 and 18,439.50

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Solution

The fourth proportional to 67,687.50, 101,531.25 and 18,439.50 is: 27,659.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,687.50 : 101,531.25 = 18,439.50 : x
  2. Step 2: Convert to fraction form
    67,687.50/101,531.25 = 18,439.50/x
  3. Step 3: Cross multiply
    67,687.50x = 101,531.25 × 18,439.50
  4. Step 4: Simplify right side
    67,687.50x = 1,872,185,484.38
  5. Step 5: Solve for x
    x = 1,872,185,484.38/67,687.50
  6. Step 6: Final answer
    x = 27,659.25

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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.