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Finding the Fourth Proportional to 221,868.80, 332,803.20 and 74,124.80

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Solution

The fourth proportional to 221,868.80, 332,803.20 and 74,124.80 is: 111,187.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,868.80 : 332,803.20 = 74,124.80 : x
  2. Step 2: Convert to fraction form
    221,868.80/332,803.20 = 74,124.80/x
  3. Step 3: Cross multiply
    221,868.80x = 332,803.20 × 74,124.80
  4. Step 4: Simplify right side
    221,868.80x = 24,668,970,639.36
  5. Step 5: Solve for x
    x = 24,668,970,639.36/221,868.80
  6. Step 6: Final answer
    x = 111,187.20

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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.