Home / 138,608.64-191,279.79-78,179.13

Finding the Fourth Proportional to 138,608.64, 191,279.79 and 78,179.13

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Solution

The fourth proportional to 138,608.64, 191,279.79 and 78,179.13 is: 107,887.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608.64 : 191,279.79 = 78,179.13 : x
  2. Step 2: Convert to fraction form
    138,608.64/191,279.79 = 78,179.13/x
  3. Step 3: Cross multiply
    138,608.64x = 191,279.79 × 78,179.13
  4. Step 4: Simplify right side
    138,608.64x = 14,954,087,568.78
  5. Step 5: Solve for x
    x = 14,954,087,568.78/138,608.64
  6. Step 6: Final answer
    x = 107,887.12

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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.