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Finding the Fourth Proportional to 68,510.19, 102,781.62 and 21,763.11

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Solution

The fourth proportional to 68,510.19, 102,781.62 and 21,763.11 is: 32,649.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,510.19 : 102,781.62 = 21,763.11 : x
  2. Step 2: Convert to fraction form
    68,510.19/102,781.62 = 21,763.11/x
  3. Step 3: Cross multiply
    68,510.19x = 102,781.62 × 21,763.11
  4. Step 4: Simplify right side
    68,510.19x = 2,236,847,702.04
  5. Step 5: Solve for x
    x = 2,236,847,702.04/68,510.19
  6. Step 6: Final answer
    x = 32,649.85

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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.