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Finding the Fourth Proportional to 100,045.56, 138,063.06 and 54,723.78

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Solution

The fourth proportional to 100,045.56, 138,063.06 and 54,723.78 is: 75,518.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,045.56 : 138,063.06 = 54,723.78 : x
  2. Step 2: Convert to fraction form
    100,045.56/138,063.06 = 54,723.78/x
  3. Step 3: Cross multiply
    100,045.56x = 138,063.06 × 54,723.78
  4. Step 4: Simplify right side
    100,045.56x = 7,555,332,521.57
  5. Step 5: Solve for x
    x = 7,555,332,521.57/100,045.56
  6. Step 6: Final answer
    x = 75,518.92

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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.