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Finding the Fourth Proportional to 221,343.17, 331,817.51 and 81,068.99

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Solution

The fourth proportional to 221,343.17, 331,817.51 and 81,068.99 is: 121,531.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,343.17 : 331,817.51 = 81,068.99 : x
  2. Step 2: Convert to fraction form
    221,343.17/331,817.51 = 81,068.99/x
  3. Step 3: Cross multiply
    221,343.17x = 331,817.51 × 81,068.99
  4. Step 4: Simplify right side
    221,343.17x = 26,900,108,943.60
  5. Step 5: Solve for x
    x = 26,900,108,943.60/221,343.17
  6. Step 6: Final answer
    x = 121,531.24

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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.