Home / 81,291.02-122,545.82-75,872.12

Finding the Fourth Proportional to 81,291.02, 122,545.82 and 75,872.12

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Solution

The fourth proportional to 81,291.02, 122,545.82 and 75,872.12 is: 114,376.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,291.02 : 122,545.82 = 75,872.12 : x
  2. Step 2: Convert to fraction form
    81,291.02/122,545.82 = 75,872.12/x
  3. Step 3: Cross multiply
    81,291.02x = 122,545.82 × 75,872.12
  4. Step 4: Simplify right side
    81,291.02x = 9,297,810,168.45
  5. Step 5: Solve for x
    x = 9,297,810,168.45/81,291.02
  6. Step 6: Final answer
    x = 114,376.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.