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Finding the Fourth Proportional to 100,458.76, 138,652.20 and 66,467.92

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Solution

The fourth proportional to 100,458.76, 138,652.20 and 66,467.92 is: 91,738.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,458.76 : 138,652.20 = 66,467.92 : x
  2. Step 2: Convert to fraction form
    100,458.76/138,652.20 = 66,467.92/x
  3. Step 3: Cross multiply
    100,458.76x = 138,652.20 × 66,467.92
  4. Step 4: Simplify right side
    100,458.76x = 9,215,923,337.42
  5. Step 5: Solve for x
    x = 9,215,923,337.42/100,458.76
  6. Step 6: Final answer
    x = 91,738.37

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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.