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Finding the Fourth Proportional to 221,491.60, 332,237.40 and 81,304.90

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Solution

The fourth proportional to 221,491.60, 332,237.40 and 81,304.90 is: 121,957.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,491.60 : 332,237.40 = 81,304.90 : x
  2. Step 2: Convert to fraction form
    221,491.60/332,237.40 = 81,304.90/x
  3. Step 3: Cross multiply
    221,491.60x = 332,237.40 × 81,304.90
  4. Step 4: Simplify right side
    221,491.60x = 27,012,528,583.26
  5. Step 5: Solve for x
    x = 27,012,528,583.26/221,491.60
  6. Step 6: Final answer
    x = 121,957.35

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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.