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Finding the Fourth Proportional to 71,500.64, 98,666.16 and 39,668.48

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Solution

The fourth proportional to 71,500.64, 98,666.16 and 39,668.48 is: 54,739.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,500.64 : 98,666.16 = 39,668.48 : x
  2. Step 2: Convert to fraction form
    71,500.64/98,666.16 = 39,668.48/x
  3. Step 3: Cross multiply
    71,500.64x = 98,666.16 × 39,668.48
  4. Step 4: Simplify right side
    71,500.64x = 3,913,936,594.64
  5. Step 5: Solve for x
    x = 3,913,936,594.64/71,500.64
  6. Step 6: Final answer
    x = 54,739.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.