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Finding the Fourth Proportional to 221,240.80, 331,496.40 and 127,583.20

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Solution

The fourth proportional to 221,240.80, 331,496.40 and 127,583.20 is: 191,164.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,240.80 : 331,496.40 = 127,583.20 : x
  2. Step 2: Convert to fraction form
    221,240.80/331,496.40 = 127,583.20/x
  3. Step 3: Cross multiply
    221,240.80x = 331,496.40 × 127,583.20
  4. Step 4: Simplify right side
    221,240.80x = 42,293,371,500.48
  5. Step 5: Solve for x
    x = 42,293,371,500.48/221,240.80
  6. Step 6: Final answer
    x = 191,164.43

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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.