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Finding the Fourth Proportional to 111,208.80, 166,780.80 and 40,123.20

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Solution

The fourth proportional to 111,208.80, 166,780.80 and 40,123.20 is: 60,173.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,208.80 : 166,780.80 = 40,123.20 : x
  2. Step 2: Convert to fraction form
    111,208.80/166,780.80 = 40,123.20/x
  3. Step 3: Cross multiply
    111,208.80x = 166,780.80 × 40,123.20
  4. Step 4: Simplify right side
    111,208.80x = 6,691,779,394.56
  5. Step 5: Solve for x
    x = 6,691,779,394.56/111,208.80
  6. Step 6: Final answer
    x = 60,173.11

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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.