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Finding the Fourth Proportional to 68,628.81, 102,972.80 and 26,538.52

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Solution

The fourth proportional to 68,628.81, 102,972.80 and 26,538.52 is: 39,819.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,628.81 : 102,972.80 = 26,538.52 : x
  2. Step 2: Convert to fraction form
    68,628.81/102,972.80 = 26,538.52/x
  3. Step 3: Cross multiply
    68,628.81x = 102,972.80 × 26,538.52
  4. Step 4: Simplify right side
    68,628.81x = 2,732,745,712.26
  5. Step 5: Solve for x
    x = 2,732,745,712.26/68,628.81
  6. Step 6: Final answer
    x = 39,819.22

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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.