Home / 90,642.08-136,007.76-40,757.42

Finding the Fourth Proportional to 90,642.08, 136,007.76 and 40,757.42

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Solution

The fourth proportional to 90,642.08, 136,007.76 and 40,757.42 is: 61,156.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,642.08 : 136,007.76 = 40,757.42 : x
  2. Step 2: Convert to fraction form
    90,642.08/136,007.76 = 40,757.42/x
  3. Step 3: Cross multiply
    90,642.08x = 136,007.76 × 40,757.42
  4. Step 4: Simplify right side
    90,642.08x = 5,543,325,397.58
  5. Step 5: Solve for x
    x = 5,543,325,397.58/90,642.08
  6. Step 6: Final answer
    x = 61,156.20

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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.