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Finding the Fourth Proportional to 221,488.40, 332,281.20 and 71,703.20

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Solution

The fourth proportional to 221,488.40, 332,281.20 and 71,703.20 is: 107,570.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,488.40 : 332,281.20 = 71,703.20 : x
  2. Step 2: Convert to fraction form
    221,488.40/332,281.20 = 71,703.20/x
  3. Step 3: Cross multiply
    221,488.40x = 332,281.20 × 71,703.20
  4. Step 4: Simplify right side
    221,488.40x = 23,825,625,339.84
  5. Step 5: Solve for x
    x = 23,825,625,339.84/221,488.40
  6. Step 6: Final answer
    x = 107,570.53

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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.