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Finding the Fourth Proportional to 123,108.28, 169,851.66 and 75,311.80

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Solution

The fourth proportional to 123,108.28, 169,851.66 and 75,311.80 is: 103,907.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,108.28 : 169,851.66 = 75,311.80 : x
  2. Step 2: Convert to fraction form
    123,108.28/169,851.66 = 75,311.80/x
  3. Step 3: Cross multiply
    123,108.28x = 169,851.66 × 75,311.80
  4. Step 4: Simplify right side
    123,108.28x = 12,791,834,247.59
  5. Step 5: Solve for x
    x = 12,791,834,247.59/123,108.28
  6. Step 6: Final answer
    x = 103,907.18

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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.