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Finding the Fourth Proportional to 138,853.74, 191,618.11 and 75,191.52

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Solution

The fourth proportional to 138,853.74, 191,618.11 and 75,191.52 is: 103,764.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,853.74 : 191,618.11 = 75,191.52 : x
  2. Step 2: Convert to fraction form
    138,853.74/191,618.11 = 75,191.52/x
  3. Step 3: Cross multiply
    138,853.74x = 191,618.11 × 75,191.52
  4. Step 4: Simplify right side
    138,853.74x = 14,408,056,950.43
  5. Step 5: Solve for x
    x = 14,408,056,950.43/138,853.74
  6. Step 6: Final answer
    x = 103,764.27

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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.