Home / 90,745.30-136,139.55-38,127.70

Finding the Fourth Proportional to 90,745.30, 136,139.55 and 38,127.70

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Solution

The fourth proportional to 90,745.30, 136,139.55 and 38,127.70 is: 57,200.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,745.30 : 136,139.55 = 38,127.70 : x
  2. Step 2: Convert to fraction form
    90,745.30/136,139.55 = 38,127.70/x
  3. Step 3: Cross multiply
    90,745.30x = 136,139.55 × 38,127.70
  4. Step 4: Simplify right side
    90,745.30x = 5,190,687,920.54
  5. Step 5: Solve for x
    x = 5,190,687,920.54/90,745.30
  6. Step 6: Final answer
    x = 57,200.63

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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.