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Finding the Fourth Proportional to 221,294.80, 331,577.40 and 127,637.20

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Solution

The fourth proportional to 221,294.80, 331,577.40 and 127,637.20 is: 191,245.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,294.80 : 331,577.40 = 127,637.20 : x
  2. Step 2: Convert to fraction form
    221,294.80/331,577.40 = 127,637.20/x
  3. Step 3: Cross multiply
    221,294.80x = 331,577.40 × 127,637.20
  4. Step 4: Simplify right side
    221,294.80x = 42,321,610,919.28
  5. Step 5: Solve for x
    x = 42,321,610,919.28/221,294.80
  6. Step 6: Final answer
    x = 191,245.39

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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.