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Finding the Fourth Proportional to 122,712.96, 169,343.04 and 69,720.96

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Solution

The fourth proportional to 122,712.96, 169,343.04 and 69,720.96 is: 96,214.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,712.96 : 169,343.04 = 69,720.96 : x
  2. Step 2: Convert to fraction form
    122,712.96/169,343.04 = 69,720.96/x
  3. Step 3: Cross multiply
    122,712.96x = 169,343.04 × 69,720.96
  4. Step 4: Simplify right side
    122,712.96x = 11,806,759,318.12
  5. Step 5: Solve for x
    x = 11,806,759,318.12/122,712.96
  6. Step 6: Final answer
    x = 96,214.44

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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.