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Finding the Fourth Proportional to 221,172.40, 332,104.20 and 127,860.40

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Solution

The fourth proportional to 221,172.40, 332,104.20 and 127,860.40 is: 191,990.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,172.40 : 332,104.20 = 127,860.40 : x
  2. Step 2: Convert to fraction form
    221,172.40/332,104.20 = 127,860.40/x
  3. Step 3: Cross multiply
    221,172.40x = 332,104.20 × 127,860.40
  4. Step 4: Simplify right side
    221,172.40x = 42,462,975,853.68
  5. Step 5: Solve for x
    x = 42,462,975,853.68/221,172.40
  6. Step 6: Final answer
    x = 191,990.39

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1.5x scale

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.