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Finding the Fourth Proportional to 221,056.40, 331,930.20 and 127,744.40

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Solution

The fourth proportional to 221,056.40, 331,930.20 and 127,744.40 is: 191,816.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,056.40 : 331,930.20 = 127,744.40 : x
  2. Step 2: Convert to fraction form
    221,056.40/331,930.20 = 127,744.40/x
  3. Step 3: Cross multiply
    221,056.40x = 331,930.20 × 127,744.40
  4. Step 4: Simplify right side
    221,056.40x = 42,402,224,240.88
  5. Step 5: Solve for x
    x = 42,402,224,240.88/221,056.40
  6. Step 6: Final answer
    x = 191,816.32

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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.