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Finding the Fourth Proportional to 123,731.61, 170,750.06 and 67,142.98

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Solution

The fourth proportional to 123,731.61, 170,750.06 and 67,142.98 is: 92,657.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,731.61 : 170,750.06 = 67,142.98 : x
  2. Step 2: Convert to fraction form
    123,731.61/170,750.06 = 67,142.98/x
  3. Step 3: Cross multiply
    123,731.61x = 170,750.06 × 67,142.98
  4. Step 4: Simplify right side
    123,731.61x = 11,464,667,863.58
  5. Step 5: Solve for x
    x = 11,464,667,863.58/123,731.61
  6. Step 6: Final answer
    x = 92,657.55

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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.