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Finding the Fourth Proportional to 123,218.60, 170,042.69 and 68,029.70

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Solution

The fourth proportional to 123,218.60, 170,042.69 and 68,029.70 is: 93,881.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,218.60 : 170,042.69 = 68,029.70 : x
  2. Step 2: Convert to fraction form
    123,218.60/170,042.69 = 68,029.70/x
  3. Step 3: Cross multiply
    123,218.60x = 170,042.69 × 68,029.70
  4. Step 4: Simplify right side
    123,218.60x = 11,567,953,187.89
  5. Step 5: Solve for x
    x = 11,567,953,187.89/123,218.60
  6. Step 6: Final answer
    x = 93,881.55

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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.