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Finding the Fourth Proportional to 71,340.80, 98,447.58 and 39,074.90

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Solution

The fourth proportional to 71,340.80, 98,447.58 and 39,074.90 is: 53,921.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,340.80 : 98,447.58 = 39,074.90 : x
  2. Step 2: Convert to fraction form
    71,340.80/98,447.58 = 39,074.90/x
  3. Step 3: Cross multiply
    71,340.80x = 98,447.58 × 39,074.90
  4. Step 4: Simplify right side
    71,340.80x = 3,846,829,343.74
  5. Step 5: Solve for x
    x = 3,846,829,343.74/71,340.80
  6. Step 6: Final answer
    x = 53,921.87

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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.