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Finding the Fourth Proportional to 120,663.99, 166,531.55 and 79,305.93

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Solution

The fourth proportional to 120,663.99, 166,531.55 and 79,305.93 is: 109,452.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,663.99 : 166,531.55 = 79,305.93 : x
  2. Step 2: Convert to fraction form
    120,663.99/166,531.55 = 79,305.93/x
  3. Step 3: Cross multiply
    120,663.99x = 166,531.55 × 79,305.93
  4. Step 4: Simplify right side
    120,663.99x = 13,206,939,050.56
  5. Step 5: Solve for x
    x = 13,206,939,050.56/120,663.99
  6. Step 6: Final answer
    x = 109,452.20

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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.