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Finding the Fourth Proportional to 158,218.05, 218,340.15 and 85,620.90

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Solution

The fourth proportional to 158,218.05, 218,340.15 and 85,620.90 is: 118,156.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,218.05 : 218,340.15 = 85,620.90 : x
  2. Step 2: Convert to fraction form
    158,218.05/218,340.15 = 85,620.90/x
  3. Step 3: Cross multiply
    158,218.05x = 218,340.15 × 85,620.90
  4. Step 4: Simplify right side
    158,218.05x = 18,694,480,149.14
  5. Step 5: Solve for x
    x = 18,694,480,149.14/158,218.05
  6. Step 6: Final answer
    x = 118,156.43

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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.