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Finding the Fourth Proportional to 123,706.39, 170,755.95 and 87,999.97

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Solution

The fourth proportional to 123,706.39, 170,755.95 and 87,999.97 is: 121,469.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,706.39 : 170,755.95 = 87,999.97 : x
  2. Step 2: Convert to fraction form
    123,706.39/170,755.95 = 87,999.97/x
  3. Step 3: Cross multiply
    123,706.39x = 170,755.95 × 87,999.97
  4. Step 4: Simplify right side
    123,706.39x = 15,026,518,477.32
  5. Step 5: Solve for x
    x = 15,026,518,477.32/123,706.39
  6. Step 6: Final answer
    x = 121,469.22

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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.