Home / 155,843.38-215,170.59-99,331.30

Finding the Fourth Proportional to 155,843.38, 215,170.59 and 99,331.30

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Solution

The fourth proportional to 155,843.38, 215,170.59 and 99,331.30 is: 137,145.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,843.38 : 215,170.59 = 99,331.30 : x
  2. Step 2: Convert to fraction form
    155,843.38/215,170.59 = 99,331.30/x
  3. Step 3: Cross multiply
    155,843.38x = 215,170.59 × 99,331.30
  4. Step 4: Simplify right side
    155,843.38x = 21,373,174,426.47
  5. Step 5: Solve for x
    x = 21,373,174,426.47/155,843.38
  6. Step 6: Final answer
    x = 137,145.22

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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.