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Finding the Fourth Proportional to 68,718.84, 103,076.88 and 21,971.70

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Solution

The fourth proportional to 68,718.84, 103,076.88 and 21,971.70 is: 32,957.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,718.84 : 103,076.88 = 21,971.70 : x
  2. Step 2: Convert to fraction form
    68,718.84/103,076.88 = 21,971.70/x
  3. Step 3: Cross multiply
    68,718.84x = 103,076.88 × 21,971.70
  4. Step 4: Simplify right side
    68,718.84x = 2,264,774,284.30
  5. Step 5: Solve for x
    x = 2,264,774,284.30/68,718.84
  6. Step 6: Final answer
    x = 32,957.11

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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.