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Finding the Fourth Proportional to 73,998.80, 111,046.80 and 42,408.80

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Solution

The fourth proportional to 73,998.80, 111,046.80 and 42,408.80 is: 63,641.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,998.80 : 111,046.80 = 42,408.80 : x
  2. Step 2: Convert to fraction form
    73,998.80/111,046.80 = 42,408.80/x
  3. Step 3: Cross multiply
    73,998.80x = 111,046.80 × 42,408.80
  4. Step 4: Simplify right side
    73,998.80x = 4,709,361,531.84
  5. Step 5: Solve for x
    x = 4,709,361,531.84/73,998.80
  6. Step 6: Final answer
    x = 63,641.05

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1.5x scale

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.