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Finding the Fourth Proportional to 118,049.70, 177,074.55 and 86,556.90

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Solution

The fourth proportional to 118,049.70, 177,074.55 and 86,556.90 is: 129,835.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,049.70 : 177,074.55 = 86,556.90 : x
  2. Step 2: Convert to fraction form
    118,049.70/177,074.55 = 86,556.90/x
  3. Step 3: Cross multiply
    118,049.70x = 177,074.55 × 86,556.90
  4. Step 4: Simplify right side
    118,049.70x = 15,327,024,116.90
  5. Step 5: Solve for x
    x = 15,327,024,116.90/118,049.70
  6. Step 6: Final answer
    x = 129,835.35

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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.