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Finding the Fourth Proportional to 68,716.84, 103,070.22 and 21,957.16

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Solution

The fourth proportional to 68,716.84, 103,070.22 and 21,957.16 is: 32,934.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,716.84 : 103,070.22 = 21,957.16 : x
  2. Step 2: Convert to fraction form
    68,716.84/103,070.22 = 21,957.16/x
  3. Step 3: Cross multiply
    68,716.84x = 103,070.22 × 21,957.16
  4. Step 4: Simplify right side
    68,716.84x = 2,263,129,311.78
  5. Step 5: Solve for x
    x = 2,263,129,311.78/68,716.84
  6. Step 6: Final answer
    x = 32,934.13

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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.