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Finding the Fourth Proportional to 68,658.82, 103,004.67 and 28,655.56

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Solution

The fourth proportional to 68,658.82, 103,004.67 and 28,655.56 is: 42,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,658.82 : 103,004.67 = 28,655.56 : x
  2. Step 2: Convert to fraction form
    68,658.82/103,004.67 = 28,655.56/x
  3. Step 3: Cross multiply
    68,658.82x = 103,004.67 × 28,655.56
  4. Step 4: Simplify right side
    68,658.82x = 2,951,656,501.47
  5. Step 5: Solve for x
    x = 2,951,656,501.47/68,658.82
  6. Step 6: Final answer
    x = 42,990.20

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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.