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Finding the Fourth Proportional to 221,552.82, 332,372.97 and 81,312.66

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Solution

The fourth proportional to 221,552.82, 332,372.97 and 81,312.66 is: 121,985.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,552.82 : 332,372.97 = 81,312.66 : x
  2. Step 2: Convert to fraction form
    221,552.82/332,372.97 = 81,312.66/x
  3. Step 3: Cross multiply
    221,552.82x = 332,372.97 × 81,312.66
  4. Step 4: Simplify right side
    221,552.82x = 27,026,130,302.80
  5. Step 5: Solve for x
    x = 27,026,130,302.80/221,552.82
  6. Step 6: Final answer
    x = 121,985.04

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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.