Home / 90,611.28-135,920.52-28,281.78

Finding the Fourth Proportional to 90,611.28, 135,920.52 and 28,281.78

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Solution

The fourth proportional to 90,611.28, 135,920.52 and 28,281.78 is: 42,423.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,611.28 : 135,920.52 = 28,281.78 : x
  2. Step 2: Convert to fraction form
    90,611.28/135,920.52 = 28,281.78/x
  3. Step 3: Cross multiply
    90,611.28x = 135,920.52 × 28,281.78
  4. Step 4: Simplify right side
    90,611.28x = 3,844,074,244.13
  5. Step 5: Solve for x
    x = 3,844,074,244.13/90,611.28
  6. Step 6: Final answer
    x = 42,423.79

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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.