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Finding the Fourth Proportional to 65,639.80, 98,330.10 and 39,266.20

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Solution

The fourth proportional to 65,639.80, 98,330.10 and 39,266.20 is: 58,821.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,639.80 : 98,330.10 = 39,266.20 : x
  2. Step 2: Convert to fraction form
    65,639.80/98,330.10 = 39,266.20/x
  3. Step 3: Cross multiply
    65,639.80x = 98,330.10 × 39,266.20
  4. Step 4: Simplify right side
    65,639.80x = 3,861,049,372.62
  5. Step 5: Solve for x
    x = 3,861,049,372.62/65,639.80
  6. Step 6: Final answer
    x = 58,821.77

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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.