Home / 148,778.20-205,314.78-85,118.68

Finding the Fourth Proportional to 148,778.20, 205,314.78 and 85,118.68

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Solution

The fourth proportional to 148,778.20, 205,314.78 and 85,118.68 is: 117,464.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,778.20 : 205,314.78 = 85,118.68 : x
  2. Step 2: Convert to fraction form
    148,778.20/205,314.78 = 85,118.68/x
  3. Step 3: Cross multiply
    148,778.20x = 205,314.78 × 85,118.68
  4. Step 4: Simplify right side
    148,778.20x = 17,476,123,058.09
  5. Step 5: Solve for x
    x = 17,476,123,058.09/148,778.20
  6. Step 6: Final answer
    x = 117,464.27

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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.