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Finding the Fourth Proportional to 68,296.52, 102,420.17 and 28,856.72

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Solution

The fourth proportional to 68,296.52, 102,420.17 and 28,856.72 is: 43,274.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,296.52 : 102,420.17 = 28,856.72 : x
  2. Step 2: Convert to fraction form
    68,296.52/102,420.17 = 28,856.72/x
  3. Step 3: Cross multiply
    68,296.52x = 102,420.17 × 28,856.72
  4. Step 4: Simplify right side
    68,296.52x = 2,955,509,511.66
  5. Step 5: Solve for x
    x = 2,955,509,511.66/68,296.52
  6. Step 6: Final answer
    x = 43,274.68

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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.