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Finding the Fourth Proportional to 68,702.52, 103,071.21 and 28,714.59

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Solution

The fourth proportional to 68,702.52, 103,071.21 and 28,714.59 is: 43,079.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,702.52 : 103,071.21 = 28,714.59 : x
  2. Step 2: Convert to fraction form
    68,702.52/103,071.21 = 28,714.59/x
  3. Step 3: Cross multiply
    68,702.52x = 103,071.21 × 28,714.59
  4. Step 4: Simplify right side
    68,702.52x = 2,959,647,535.95
  5. Step 5: Solve for x
    x = 2,959,647,535.95/68,702.52
  6. Step 6: Final answer
    x = 43,079.17

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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.