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Finding the Fourth Proportional to 71,711.71, 98,960.45 and 39,005.30

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Solution

The fourth proportional to 71,711.71, 98,960.45 and 39,005.30 is: 53,826.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,711.71 : 98,960.45 = 39,005.30 : x
  2. Step 2: Convert to fraction form
    71,711.71/98,960.45 = 39,005.30/x
  3. Step 3: Cross multiply
    71,711.71x = 98,960.45 × 39,005.30
  4. Step 4: Simplify right side
    71,711.71x = 3,859,982,040.39
  5. Step 5: Solve for x
    x = 3,859,982,040.39/71,711.71
  6. Step 6: Final answer
    x = 53,826.38

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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.