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Finding the Fourth Proportional to 158,414.40, 218,610.90 and 86,794.20

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Solution

The fourth proportional to 158,414.40, 218,610.90 and 86,794.20 is: 119,775.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,414.40 : 218,610.90 = 86,794.20 : x
  2. Step 2: Convert to fraction form
    158,414.40/218,610.90 = 86,794.20/x
  3. Step 3: Cross multiply
    158,414.40x = 218,610.90 × 86,794.20
  4. Step 4: Simplify right side
    158,414.40x = 18,974,158,176.78
  5. Step 5: Solve for x
    x = 18,974,158,176.78/158,414.40
  6. Step 6: Final answer
    x = 119,775.46

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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.