Home / 90,872.18-136,329.83-28,542.68

Finding the Fourth Proportional to 90,872.18, 136,329.83 and 28,542.68

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Solution

The fourth proportional to 90,872.18, 136,329.83 and 28,542.68 is: 42,820.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,872.18 : 136,329.83 = 28,542.68 : x
  2. Step 2: Convert to fraction form
    90,872.18/136,329.83 = 28,542.68/x
  3. Step 3: Cross multiply
    90,872.18x = 136,329.83 × 28,542.68
  4. Step 4: Simplify right side
    90,872.18x = 3,891,217,887.78
  5. Step 5: Solve for x
    x = 3,891,217,887.78/90,872.18
  6. Step 6: Final answer
    x = 42,820.79

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1.5x scale

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.