Home / 90,108.13-135,217.79-45,766.71

Finding the Fourth Proportional to 90,108.13, 135,217.79 and 45,766.71

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Solution

The fourth proportional to 90,108.13, 135,217.79 and 45,766.71 is: 68,678.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,108.13 : 135,217.79 = 45,766.71 : x
  2. Step 2: Convert to fraction form
    90,108.13/135,217.79 = 45,766.71/x
  3. Step 3: Cross multiply
    90,108.13x = 135,217.79 × 45,766.71
  4. Step 4: Simplify right side
    90,108.13x = 6,188,473,381.77
  5. Step 5: Solve for x
    x = 6,188,473,381.77/90,108.13
  6. Step 6: Final answer
    x = 68,678.30

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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.