Home / 90,872.19-136,329.84-28,542.69

Finding the Fourth Proportional to 90,872.19, 136,329.84 and 28,542.69

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Solution

The fourth proportional to 90,872.19, 136,329.84 and 28,542.69 is: 42,820.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,872.19 : 136,329.84 = 28,542.69 : x
  2. Step 2: Convert to fraction form
    90,872.19/136,329.84 = 28,542.69/x
  3. Step 3: Cross multiply
    90,872.19x = 136,329.84 × 28,542.69
  4. Step 4: Simplify right side
    90,872.19x = 3,891,220,360.87
  5. Step 5: Solve for x
    x = 3,891,220,360.87/90,872.19
  6. Step 6: Final answer
    x = 42,820.81

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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.