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Finding the Fourth Proportional to 67,239.78, 92,620 and 51,296.54

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Solution

The fourth proportional to 67,239.78, 92,620 and 51,296.54 is: 70,658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,239.78 : 92,620 = 51,296.54 : x
  2. Step 2: Convert to fraction form
    67,239.78/92,620 = 51,296.54/x
  3. Step 3: Cross multiply
    67,239.78x = 92,620 × 51,296.54
  4. Step 4: Simplify right side
    67,239.78x = 4,751,085,534.80
  5. Step 5: Solve for x
    x = 4,751,085,534.80/67,239.78
  6. Step 6: Final answer
    x = 70,658.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.