Home / 90,728.29-136,077.85-28,398.79

Finding the Fourth Proportional to 90,728.29, 136,077.85 and 28,398.79

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Solution

The fourth proportional to 90,728.29, 136,077.85 and 28,398.79 is: 42,593.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,728.29 : 136,077.85 = 28,398.79 : x
  2. Step 2: Convert to fraction form
    90,728.29/136,077.85 = 28,398.79/x
  3. Step 3: Cross multiply
    90,728.29x = 136,077.85 × 28,398.79
  4. Step 4: Simplify right side
    90,728.29x = 3,864,446,285.80
  5. Step 5: Solve for x
    x = 3,864,446,285.80/90,728.29
  6. Step 6: Final answer
    x = 42,593.62

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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.