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Finding the Fourth Proportional to 82,126.80, 122,959.80 and 79,822.80

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Solution

The fourth proportional to 82,126.80, 122,959.80 and 79,822.80 is: 119,510.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,126.80 : 122,959.80 = 79,822.80 : x
  2. Step 2: Convert to fraction form
    82,126.80/122,959.80 = 79,822.80/x
  3. Step 3: Cross multiply
    82,126.80x = 122,959.80 × 79,822.80
  4. Step 4: Simplify right side
    82,126.80x = 9,814,995,523.44
  5. Step 5: Solve for x
    x = 9,814,995,523.44/82,126.80
  6. Step 6: Final answer
    x = 119,510.26

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1.5x scale

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.