Home / 71,972.46-99,319.92-40,140.72

Finding the Fourth Proportional to 71,972.46, 99,319.92 and 40,140.72

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Solution

The fourth proportional to 71,972.46, 99,319.92 and 40,140.72 is: 55,393.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,972.46 : 99,319.92 = 40,140.72 : x
  2. Step 2: Convert to fraction form
    71,972.46/99,319.92 = 40,140.72/x
  3. Step 3: Cross multiply
    71,972.46x = 99,319.92 × 40,140.72
  4. Step 4: Simplify right side
    71,972.46x = 3,986,773,099.14
  5. Step 5: Solve for x
    x = 3,986,773,099.14/71,972.46
  6. Step 6: Final answer
    x = 55,393.04

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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.