Home / 71,972.42-99,322.10-40,143.36

Finding the Fourth Proportional to 71,972.42, 99,322.10 and 40,143.36

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Solution

The fourth proportional to 71,972.42, 99,322.10 and 40,143.36 is: 55,397.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,972.42 : 99,322.10 = 40,143.36 : x
  2. Step 2: Convert to fraction form
    71,972.42/99,322.10 = 40,143.36/x
  3. Step 3: Cross multiply
    71,972.42x = 99,322.10 × 40,143.36
  4. Step 4: Simplify right side
    71,972.42x = 3,987,123,138.53
  5. Step 5: Solve for x
    x = 3,987,123,138.53/71,972.42
  6. Step 6: Final answer
    x = 55,397.93

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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.