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Finding the Fourth Proportional to 71,352.80, 98,469.80 and 39,521.64

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Solution

The fourth proportional to 71,352.80, 98,469.80 and 39,521.64 is: 54,541.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,352.80 : 98,469.80 = 39,521.64 : x
  2. Step 2: Convert to fraction form
    71,352.80/98,469.80 = 39,521.64/x
  3. Step 3: Cross multiply
    71,352.80x = 98,469.80 × 39,521.64
  4. Step 4: Simplify right side
    71,352.80x = 3,891,687,986.47
  5. Step 5: Solve for x
    x = 3,891,687,986.47/71,352.80
  6. Step 6: Final answer
    x = 54,541.49

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1.5x scale

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.