Home / 138,678.38-191,375.79-75,017.06

Finding the Fourth Proportional to 138,678.38, 191,375.79 and 75,017.06

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Solution

The fourth proportional to 138,678.38, 191,375.79 and 75,017.06 is: 103,523.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,678.38 : 191,375.79 = 75,017.06 : x
  2. Step 2: Convert to fraction form
    138,678.38/191,375.79 = 75,017.06/x
  3. Step 3: Cross multiply
    138,678.38x = 191,375.79 × 75,017.06
  4. Step 4: Simplify right side
    138,678.38x = 14,356,449,120.98
  5. Step 5: Solve for x
    x = 14,356,449,120.98/138,678.38
  6. Step 6: Final answer
    x = 103,523.34

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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.