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Finding the Fourth Proportional to 72,819.96, 100,494.02 and 40,112.92

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Solution

The fourth proportional to 72,819.96, 100,494.02 and 40,112.92 is: 55,357.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,819.96 : 100,494.02 = 40,112.92 : x
  2. Step 2: Convert to fraction form
    72,819.96/100,494.02 = 40,112.92/x
  3. Step 3: Cross multiply
    72,819.96x = 100,494.02 × 40,112.92
  4. Step 4: Simplify right side
    72,819.96x = 4,031,108,585.00
  5. Step 5: Solve for x
    x = 4,031,108,585.00/72,819.96
  6. Step 6: Final answer
    x = 55,357.19

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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.