Home / 90,842.28-136,285.23-28,512.78

Finding the Fourth Proportional to 90,842.28, 136,285.23 and 28,512.78

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Solution

The fourth proportional to 90,842.28, 136,285.23 and 28,512.78 is: 42,776.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,842.28 : 136,285.23 = 28,512.78 : x
  2. Step 2: Convert to fraction form
    90,842.28/136,285.23 = 28,512.78/x
  3. Step 3: Cross multiply
    90,842.28x = 136,285.23 × 28,512.78
  4. Step 4: Simplify right side
    90,842.28x = 3,885,870,780.24
  5. Step 5: Solve for x
    x = 3,885,870,780.24/90,842.28
  6. Step 6: Final answer
    x = 42,776.02

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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.