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Finding the Fourth Proportional to 221,602.80, 332,316.72 and 81,284.88

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Solution

The fourth proportional to 221,602.80, 332,316.72 and 81,284.88 is: 121,895.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,602.80 : 332,316.72 = 81,284.88 : x
  2. Step 2: Convert to fraction form
    221,602.80/332,316.72 = 81,284.88/x
  3. Step 3: Cross multiply
    221,602.80x = 332,316.72 × 81,284.88
  4. Step 4: Simplify right side
    221,602.80x = 27,012,324,707.19
  5. Step 5: Solve for x
    x = 27,012,324,707.19/221,602.80
  6. Step 6: Final answer
    x = 121,895.23

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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.