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Finding the Fourth Proportional to 71,320.97, 98,422.94 and 39,489.87

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Solution

The fourth proportional to 71,320.97, 98,422.94 and 39,489.87 is: 54,496.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,320.97 : 98,422.94 = 39,489.87 : x
  2. Step 2: Convert to fraction form
    71,320.97/98,422.94 = 39,489.87/x
  3. Step 3: Cross multiply
    71,320.97x = 98,422.94 × 39,489.87
  4. Step 4: Simplify right side
    71,320.97x = 3,886,709,601.41
  5. Step 5: Solve for x
    x = 3,886,709,601.41/71,320.97
  6. Step 6: Final answer
    x = 54,496.02

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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.