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Finding the Fourth Proportional to 72,066.40, 108,115.80 and 22,148.80

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Solution

The fourth proportional to 72,066.40, 108,115.80 and 22,148.80 is: 33,228.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,066.40 : 108,115.80 = 22,148.80 : x
  2. Step 2: Convert to fraction form
    72,066.40/108,115.80 = 22,148.80/x
  3. Step 3: Cross multiply
    72,066.40x = 108,115.80 × 22,148.80
  4. Step 4: Simplify right side
    72,066.40x = 2,394,635,231.04
  5. Step 5: Solve for x
    x = 2,394,635,231.04/72,066.40
  6. Step 6: Final answer
    x = 33,228.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.