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Finding the Fourth Proportional to 68,456.52, 102,640.84 and 28,503.18

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Solution

The fourth proportional to 68,456.52, 102,640.84 and 28,503.18 is: 42,736.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,456.52 : 102,640.84 = 28,503.18 : x
  2. Step 2: Convert to fraction form
    68,456.52/102,640.84 = 28,503.18/x
  3. Step 3: Cross multiply
    68,456.52x = 102,640.84 × 28,503.18
  4. Step 4: Simplify right side
    68,456.52x = 2,925,590,266.61
  5. Step 5: Solve for x
    x = 2,925,590,266.61/68,456.52
  6. Step 6: Final answer
    x = 42,736.47

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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.