Home / 90,728.85-136,107.86-31,581.43

Finding the Fourth Proportional to 90,728.85, 136,107.86 and 31,581.43

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Solution

The fourth proportional to 90,728.85, 136,107.86 and 31,581.43 is: 47,377.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,728.85 : 136,107.86 = 31,581.43 : x
  2. Step 2: Convert to fraction form
    90,728.85/136,107.86 = 31,581.43/x
  3. Step 3: Cross multiply
    90,728.85x = 136,107.86 × 31,581.43
  4. Step 4: Simplify right side
    90,728.85x = 4,298,480,853.04
  5. Step 5: Solve for x
    x = 4,298,480,853.04/90,728.85
  6. Step 6: Final answer
    x = 47,377.22

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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.