Home / 91,820.10-137,731.02-27,778.75

Finding the Fourth Proportional to 91,820.10, 137,731.02 and 27,778.75

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Solution

The fourth proportional to 91,820.10, 137,731.02 and 27,778.75 is: 41,668.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,820.10 : 137,731.02 = 27,778.75 : x
  2. Step 2: Convert to fraction form
    91,820.10/137,731.02 = 27,778.75/x
  3. Step 3: Cross multiply
    91,820.10x = 137,731.02 × 27,778.75
  4. Step 4: Simplify right side
    91,820.10x = 3,825,995,123.33
  5. Step 5: Solve for x
    x = 3,825,995,123.33/91,820.10
  6. Step 6: Final answer
    x = 41,668.38

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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.