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Finding the Fourth Proportional to 123,470.51, 170,390.12 and 66,881.88

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Solution

The fourth proportional to 123,470.51, 170,390.12 and 66,881.88 is: 92,297.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,470.51 : 170,390.12 = 66,881.88 : x
  2. Step 2: Convert to fraction form
    123,470.51/170,390.12 = 66,881.88/x
  3. Step 3: Cross multiply
    123,470.51x = 170,390.12 × 66,881.88
  4. Step 4: Simplify right side
    123,470.51x = 11,396,011,224.62
  5. Step 5: Solve for x
    x = 11,396,011,224.62/123,470.51
  6. Step 6: Final answer
    x = 92,297.44

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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.