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Finding the Fourth Proportional to 65,732.88, 98,604.72 and 18,986.16

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Solution

The fourth proportional to 65,732.88, 98,604.72 and 18,986.16 is: 28,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,732.88 : 98,604.72 = 18,986.16 : x
  2. Step 2: Convert to fraction form
    65,732.88/98,604.72 = 18,986.16/x
  3. Step 3: Cross multiply
    65,732.88x = 98,604.72 × 18,986.16
  4. Step 4: Simplify right side
    65,732.88x = 1,872,124,990.68
  5. Step 5: Solve for x
    x = 1,872,124,990.68/65,732.88
  6. Step 6: Final answer
    x = 28,480.80

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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.