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Finding the Fourth Proportional to 129,907.67, 179,260.70 and 76,182.80

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Solution

The fourth proportional to 129,907.67, 179,260.70 and 76,182.80 is: 105,125.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,907.67 : 179,260.70 = 76,182.80 : x
  2. Step 2: Convert to fraction form
    129,907.67/179,260.70 = 76,182.80/x
  3. Step 3: Cross multiply
    129,907.67x = 179,260.70 × 76,182.80
  4. Step 4: Simplify right side
    129,907.67x = 13,656,580,778.74
  5. Step 5: Solve for x
    x = 13,656,580,778.74/129,907.67
  6. Step 6: Final answer
    x = 105,125.29

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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.