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Finding the Fourth Proportional to 129,765.53, 179,042.54 and 76,021.65

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Solution

The fourth proportional to 129,765.53, 179,042.54 and 76,021.65 is: 104,890.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,765.53 : 179,042.54 = 76,021.65 : x
  2. Step 2: Convert to fraction form
    129,765.53/179,042.54 = 76,021.65/x
  3. Step 3: Cross multiply
    129,765.53x = 179,042.54 × 76,021.65
  4. Step 4: Simplify right side
    129,765.53x = 13,611,108,930.88
  5. Step 5: Solve for x
    x = 13,611,108,930.88/129,765.53
  6. Step 6: Final answer
    x = 104,890.02

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1.5x scale

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.