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Finding the Fourth Proportional to 221,077.80, 331,681.30 and 71,314.79

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Solution

The fourth proportional to 221,077.80, 331,681.30 and 71,314.79 is: 106,993.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,077.80 : 331,681.30 = 71,314.79 : x
  2. Step 2: Convert to fraction form
    221,077.80/331,681.30 = 71,314.79/x
  3. Step 3: Cross multiply
    221,077.80x = 331,681.30 × 71,314.79
  4. Step 4: Simplify right side
    221,077.80x = 23,653,780,419.73
  5. Step 5: Solve for x
    x = 23,653,780,419.73/221,077.80
  6. Step 6: Final answer
    x = 106,993.02

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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.