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Finding the Fourth Proportional to 221,423.70, 332,135.55 and 81,164.10

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Solution

The fourth proportional to 221,423.70, 332,135.55 and 81,164.10 is: 121,746.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,423.70 : 332,135.55 = 81,164.10 : x
  2. Step 2: Convert to fraction form
    221,423.70/332,135.55 = 81,164.10/x
  3. Step 3: Cross multiply
    221,423.70x = 332,135.55 × 81,164.10
  4. Step 4: Simplify right side
    221,423.70x = 26,957,482,993.76
  5. Step 5: Solve for x
    x = 26,957,482,993.76/221,423.70
  6. Step 6: Final answer
    x = 121,746.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.