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Finding the Fourth Proportional to 218,217.95, 301,137.89 and 122,724.65

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Solution

The fourth proportional to 218,217.95, 301,137.89 and 122,724.65 is: 169,358.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,217.95 : 301,137.89 = 122,724.65 : x
  2. Step 2: Convert to fraction form
    218,217.95/301,137.89 = 122,724.65/x
  3. Step 3: Cross multiply
    218,217.95x = 301,137.89 × 122,724.65
  4. Step 4: Simplify right side
    218,217.95x = 36,957,042,291.21
  5. Step 5: Solve for x
    x = 36,957,042,291.21/218,217.95
  6. Step 6: Final answer
    x = 169,358.40

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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.