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Finding the Fourth Proportional to 71,471.70, 98,626.14 and 39,639.42

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Solution

The fourth proportional to 71,471.70, 98,626.14 and 39,639.42 is: 54,699.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,471.70 : 98,626.14 = 39,639.42 : x
  2. Step 2: Convert to fraction form
    71,471.70/98,626.14 = 39,639.42/x
  3. Step 3: Cross multiply
    71,471.70x = 98,626.14 × 39,639.42
  4. Step 4: Simplify right side
    71,471.70x = 3,909,482,986.44
  5. Step 5: Solve for x
    x = 3,909,482,986.44/71,471.70
  6. Step 6: Final answer
    x = 54,699.73

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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.