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Finding the Fourth Proportional to 129,752.80, 179,060.16 and 76,069.60

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Solution

The fourth proportional to 129,752.80, 179,060.16 and 76,069.60 is: 104,976.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,752.80 : 179,060.16 = 76,069.60 : x
  2. Step 2: Convert to fraction form
    129,752.80/179,060.16 = 76,069.60/x
  3. Step 3: Cross multiply
    129,752.80x = 179,060.16 × 76,069.60
  4. Step 4: Simplify right side
    129,752.80x = 13,621,034,747.14
  5. Step 5: Solve for x
    x = 13,621,034,747.14/129,752.80
  6. Step 6: Final answer
    x = 104,976.81

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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.