Home / 115,115.97-158,864.85-64,128.69

Finding the Fourth Proportional to 115,115.97, 158,864.85 and 64,128.69

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Solution

The fourth proportional to 115,115.97, 158,864.85 and 64,128.69 is: 88,500.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,115.97 : 158,864.85 = 64,128.69 : x
  2. Step 2: Convert to fraction form
    115,115.97/158,864.85 = 64,128.69/x
  3. Step 3: Cross multiply
    115,115.97x = 158,864.85 × 64,128.69
  4. Step 4: Simplify right side
    115,115.97x = 10,187,794,717.55
  5. Step 5: Solve for x
    x = 10,187,794,717.55/115,115.97
  6. Step 6: Final answer
    x = 88,500.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.