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Finding the Fourth Proportional to 100,124.80, 138,170.13 and 54,801.73

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Solution

The fourth proportional to 100,124.80, 138,170.13 and 54,801.73 is: 75,625.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,124.80 : 138,170.13 = 54,801.73 : x
  2. Step 2: Convert to fraction form
    100,124.80/138,170.13 = 54,801.73/x
  3. Step 3: Cross multiply
    100,124.80x = 138,170.13 × 54,801.73
  4. Step 4: Simplify right side
    100,124.80x = 7,571,962,158.32
  5. Step 5: Solve for x
    x = 7,571,962,158.32/100,124.80
  6. Step 6: Final answer
    x = 75,625.24

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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.