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Finding the Fourth Proportional to 123,705.39, 170,754.57 and 87,998.97

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Solution

The fourth proportional to 123,705.39, 170,754.57 and 87,998.97 is: 121,467.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,705.39 : 170,754.57 = 87,998.97 : x
  2. Step 2: Convert to fraction form
    123,705.39/170,754.57 = 87,998.97/x
  3. Step 3: Cross multiply
    123,705.39x = 170,754.57 × 87,998.97
  4. Step 4: Simplify right side
    123,705.39x = 15,026,226,282.79
  5. Step 5: Solve for x
    x = 15,026,226,282.79/123,705.39
  6. Step 6: Final answer
    x = 121,467.84

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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.