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Finding the Fourth Proportional to 138,919.20, 191,708.46 and 75,256.98

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Solution

The fourth proportional to 138,919.20, 191,708.46 and 75,256.98 is: 103,854.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,919.20 : 191,708.46 = 75,256.98 : x
  2. Step 2: Convert to fraction form
    138,919.20/191,708.46 = 75,256.98/x
  3. Step 3: Cross multiply
    138,919.20x = 191,708.46 × 75,256.98
  4. Step 4: Simplify right side
    138,919.20x = 14,427,399,740.05
  5. Step 5: Solve for x
    x = 14,427,399,740.05/138,919.20
  6. Step 6: Final answer
    x = 103,854.61

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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.