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Finding the Fourth Proportional to 122,124, 168,531.12 and 69,132

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Solution

The fourth proportional to 122,124, 168,531.12 and 69,132 is: 95,402.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,124 : 168,531.12 = 69,132 : x
  2. Step 2: Convert to fraction form
    122,124/168,531.12 = 69,132/x
  3. Step 3: Cross multiply
    122,124x = 168,531.12 × 69,132
  4. Step 4: Simplify right side
    122,124x = 11,650,893,387.84
  5. Step 5: Solve for x
    x = 11,650,893,387.84/122,124
  6. Step 6: Final answer
    x = 95,402.16

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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.