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Finding the Fourth Proportional to 72,618.21, 100,203.83 and 42,381.62

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Solution

The fourth proportional to 72,618.21, 100,203.83 and 42,381.62 is: 58,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,618.21 : 100,203.83 = 42,381.62 : x
  2. Step 2: Convert to fraction form
    72,618.21/100,203.83 = 42,381.62/x
  3. Step 3: Cross multiply
    72,618.21x = 100,203.83 × 42,381.62
  4. Step 4: Simplify right side
    72,618.21x = 4,246,799,932.68
  5. Step 5: Solve for x
    x = 4,246,799,932.68/72,618.21
  6. Step 6: Final answer
    x = 58,481.20

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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.