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Finding the Fourth Proportional to 71,694.58, 98,938.29 and 39,863.50

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Solution

The fourth proportional to 71,694.58, 98,938.29 and 39,863.50 is: 55,011.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,694.58 : 98,938.29 = 39,863.50 : x
  2. Step 2: Convert to fraction form
    71,694.58/98,938.29 = 39,863.50/x
  3. Step 3: Cross multiply
    71,694.58x = 98,938.29 × 39,863.50
  4. Step 4: Simplify right side
    71,694.58x = 3,944,026,523.42
  5. Step 5: Solve for x
    x = 3,944,026,523.42/71,694.58
  6. Step 6: Final answer
    x = 55,011.50

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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.