Home / 155,839.66-215,065.06-87,859.20

Finding the Fourth Proportional to 155,839.66, 215,065.06 and 87,859.20

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Solution

The fourth proportional to 155,839.66, 215,065.06 and 87,859.20 is: 121,249.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,839.66 : 215,065.06 = 87,859.20 : x
  2. Step 2: Convert to fraction form
    155,839.66/215,065.06 = 87,859.20/x
  3. Step 3: Cross multiply
    155,839.66x = 215,065.06 × 87,859.20
  4. Step 4: Simplify right side
    155,839.66x = 18,895,444,119.55
  5. Step 5: Solve for x
    x = 18,895,444,119.55/155,839.66
  6. Step 6: Final answer
    x = 121,249.26

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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.