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Finding the Fourth Proportional to 138,794.67, 191,522.44 and 80,642.34

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Solution

The fourth proportional to 138,794.67, 191,522.44 and 80,642.34 is: 111,278.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,794.67 : 191,522.44 = 80,642.34 : x
  2. Step 2: Convert to fraction form
    138,794.67/191,522.44 = 80,642.34/x
  3. Step 3: Cross multiply
    138,794.67x = 191,522.44 × 80,642.34
  4. Step 4: Simplify right side
    138,794.67x = 15,444,817,724.11
  5. Step 5: Solve for x
    x = 15,444,817,724.11/138,794.67
  6. Step 6: Final answer
    x = 111,278.18

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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.