Home / 129,777.04-179,079.87-78,817.66

Finding the Fourth Proportional to 129,777.04, 179,079.87 and 78,817.66

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Solution

The fourth proportional to 129,777.04, 179,079.87 and 78,817.66 is: 108,760.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,777.04 : 179,079.87 = 78,817.66 : x
  2. Step 2: Convert to fraction form
    129,777.04/179,079.87 = 78,817.66/x
  3. Step 3: Cross multiply
    129,777.04x = 179,079.87 × 78,817.66
  4. Step 4: Simplify right side
    129,777.04x = 14,114,656,306.50
  5. Step 5: Solve for x
    x = 14,114,656,306.50/129,777.04
  6. Step 6: Final answer
    x = 108,760.81

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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.