Home / 90,545.33-135,842.15-31,380.95

Finding the Fourth Proportional to 90,545.33, 135,842.15 and 31,380.95

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Solution

The fourth proportional to 90,545.33, 135,842.15 and 31,380.95 is: 47,079.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,545.33 : 135,842.15 = 31,380.95 : x
  2. Step 2: Convert to fraction form
    90,545.33/135,842.15 = 31,380.95/x
  3. Step 3: Cross multiply
    90,545.33x = 135,842.15 × 31,380.95
  4. Step 4: Simplify right side
    90,545.33x = 4,262,855,717.04
  5. Step 5: Solve for x
    x = 4,262,855,717.04/90,545.33
  6. Step 6: Final answer
    x = 47,079.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.