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Finding the Fourth Proportional to 138,785.74, 191,524.80 and 75,123.52

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Solution

The fourth proportional to 138,785.74, 191,524.80 and 75,123.52 is: 103,670.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,785.74 : 191,524.80 = 75,123.52 : x
  2. Step 2: Convert to fraction form
    138,785.74/191,524.80 = 75,123.52/x
  3. Step 3: Cross multiply
    138,785.74x = 191,524.80 × 75,123.52
  4. Step 4: Simplify right side
    138,785.74x = 14,388,017,143.30
  5. Step 5: Solve for x
    x = 14,388,017,143.30/138,785.74
  6. Step 6: Final answer
    x = 103,670.72

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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.