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Finding the Fourth Proportional to 221,973.60, 332,960.40 and 81,786.90

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Solution

The fourth proportional to 221,973.60, 332,960.40 and 81,786.90 is: 122,680.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,973.60 : 332,960.40 = 81,786.90 : x
  2. Step 2: Convert to fraction form
    221,973.60/332,960.40 = 81,786.90/x
  3. Step 3: Cross multiply
    221,973.60x = 332,960.40 × 81,786.90
  4. Step 4: Simplify right side
    221,973.60x = 27,231,798,938.76
  5. Step 5: Solve for x
    x = 27,231,798,938.76/221,973.60
  6. Step 6: Final answer
    x = 122,680.35

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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.