Home / 131,414.32-181,378.16-85,409.56

Finding the Fourth Proportional to 131,414.32, 181,378.16 and 85,409.56

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Solution

The fourth proportional to 131,414.32, 181,378.16 and 85,409.56 is: 117,882.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,414.32 : 181,378.16 = 85,409.56 : x
  2. Step 2: Convert to fraction form
    131,414.32/181,378.16 = 85,409.56/x
  3. Step 3: Cross multiply
    131,414.32x = 181,378.16 × 85,409.56
  4. Step 4: Simplify right side
    131,414.32x = 15,491,428,839.21
  5. Step 5: Solve for x
    x = 15,491,428,839.21/131,414.32
  6. Step 6: Final answer
    x = 117,882.35

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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.