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Finding the Fourth Proportional to 122,570.69, 169,129.13 and 68,845.41

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Solution

The fourth proportional to 122,570.69, 169,129.13 and 68,845.41 is: 94,996.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,570.69 : 169,129.13 = 68,845.41 : x
  2. Step 2: Convert to fraction form
    122,570.69/169,129.13 = 68,845.41/x
  3. Step 3: Cross multiply
    122,570.69x = 169,129.13 × 68,845.41
  4. Step 4: Simplify right side
    122,570.69x = 11,643,763,953.57
  5. Step 5: Solve for x
    x = 11,643,763,953.57/122,570.69
  6. Step 6: Final answer
    x = 94,996.32

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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.