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Finding the Fourth Proportional to 221,453.10, 332,114.85 and 79,281.90

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Solution

The fourth proportional to 221,453.10, 332,114.85 and 79,281.90 is: 118,899.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,453.10 : 332,114.85 = 79,281.90 : x
  2. Step 2: Convert to fraction form
    221,453.10/332,114.85 = 79,281.90/x
  3. Step 3: Cross multiply
    221,453.10x = 332,114.85 × 79,281.90
  4. Step 4: Simplify right side
    221,453.10x = 26,330,696,326.22
  5. Step 5: Solve for x
    x = 26,330,696,326.22/221,453.10
  6. Step 6: Final answer
    x = 118,899.65

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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.