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Finding the Fourth Proportional to 123,901.78, 170,984.01 and 67,312.66

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Solution

The fourth proportional to 123,901.78, 170,984.01 and 67,312.66 is: 92,891.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,901.78 : 170,984.01 = 67,312.66 : x
  2. Step 2: Convert to fraction form
    123,901.78/170,984.01 = 67,312.66/x
  3. Step 3: Cross multiply
    123,901.78x = 170,984.01 × 67,312.66
  4. Step 4: Simplify right side
    123,901.78x = 11,509,388,530.57
  5. Step 5: Solve for x
    x = 11,509,388,530.57/123,901.78
  6. Step 6: Final answer
    x = 92,891.23

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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.