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Finding the Fourth Proportional to 65,718.70, 98,578.08 and 18,331.88

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Solution

The fourth proportional to 65,718.70, 98,578.08 and 18,331.88 is: 27,497.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,718.70 : 98,578.08 = 18,331.88 : x
  2. Step 2: Convert to fraction form
    65,718.70/98,578.08 = 18,331.88/x
  3. Step 3: Cross multiply
    65,718.70x = 98,578.08 × 18,331.88
  4. Step 4: Simplify right side
    65,718.70x = 1,807,121,040.30
  5. Step 5: Solve for x
    x = 1,807,121,040.30/65,718.70
  6. Step 6: Final answer
    x = 27,497.82

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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.