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Finding the Fourth Proportional to 123,900.78, 170,982.63 and 67,311.66

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Solution

The fourth proportional to 123,900.78, 170,982.63 and 67,311.66 is: 92,889.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,900.78 : 170,982.63 = 67,311.66 : x
  2. Step 2: Convert to fraction form
    123,900.78/170,982.63 = 67,311.66/x
  3. Step 3: Cross multiply
    123,900.78x = 170,982.63 × 67,311.66
  4. Step 4: Simplify right side
    123,900.78x = 11,509,124,656.47
  5. Step 5: Solve for x
    x = 11,509,124,656.47/123,900.78
  6. Step 6: Final answer
    x = 92,889.85

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1.5x scale

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.