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Finding the Fourth Proportional to 68,287.71, 102,426.78 and 18,366.70

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Solution

The fourth proportional to 68,287.71, 102,426.78 and 18,366.70 is: 27,548.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,287.71 : 102,426.78 = 18,366.70 : x
  2. Step 2: Convert to fraction form
    68,287.71/102,426.78 = 18,366.70/x
  3. Step 3: Cross multiply
    68,287.71x = 102,426.78 × 18,366.70
  4. Step 4: Simplify right side
    68,287.71x = 1,881,241,841.77
  5. Step 5: Solve for x
    x = 1,881,241,841.77/68,287.71
  6. Step 6: Final answer
    x = 27,548.76

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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.