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Finding the Fourth Proportional to 221,347.68, 331,824.24 and 81,073.50

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Solution

The fourth proportional to 221,347.68, 331,824.24 and 81,073.50 is: 121,537.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,347.68 : 331,824.24 = 81,073.50 : x
  2. Step 2: Convert to fraction form
    221,347.68/331,824.24 = 81,073.50/x
  3. Step 3: Cross multiply
    221,347.68x = 331,824.24 × 81,073.50
  4. Step 4: Simplify right side
    221,347.68x = 26,902,152,521.64
  5. Step 5: Solve for x
    x = 26,902,152,521.64/221,347.68
  6. Step 6: Final answer
    x = 121,537.99

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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.