Home / 115,517.20-173,013.36-90,400.72

Finding the Fourth Proportional to 115,517.20, 173,013.36 and 90,400.72

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Solution

The fourth proportional to 115,517.20, 173,013.36 and 90,400.72 is: 135,395.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,517.20 : 173,013.36 = 90,400.72 : x
  2. Step 2: Convert to fraction form
    115,517.20/173,013.36 = 90,400.72/x
  3. Step 3: Cross multiply
    115,517.20x = 173,013.36 × 90,400.72
  4. Step 4: Simplify right side
    115,517.20x = 15,640,532,313.62
  5. Step 5: Solve for x
    x = 15,640,532,313.62/115,517.20
  6. Step 6: Final answer
    x = 135,395.70

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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.