Home / 115,732.20-159,738.30-72,737.40

Finding the Fourth Proportional to 115,732.20, 159,738.30 and 72,737.40

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Solution

The fourth proportional to 115,732.20, 159,738.30 and 72,737.40 is: 100,395.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,732.20 : 159,738.30 = 72,737.40 : x
  2. Step 2: Convert to fraction form
    115,732.20/159,738.30 = 72,737.40/x
  3. Step 3: Cross multiply
    115,732.20x = 159,738.30 × 72,737.40
  4. Step 4: Simplify right side
    115,732.20x = 11,618,948,622.42
  5. Step 5: Solve for x
    x = 11,618,948,622.42/115,732.20
  6. Step 6: Final answer
    x = 100,395.12

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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.