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Finding the Fourth Proportional to 122,502.60, 169,043.22 and 68,783.40

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Solution

The fourth proportional to 122,502.60, 169,043.22 and 68,783.40 is: 94,915.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,502.60 : 169,043.22 = 68,783.40 : x
  2. Step 2: Convert to fraction form
    122,502.60/169,043.22 = 68,783.40/x
  3. Step 3: Cross multiply
    122,502.60x = 169,043.22 × 68,783.40
  4. Step 4: Simplify right side
    122,502.60x = 11,627,367,418.55
  5. Step 5: Solve for x
    x = 11,627,367,418.55/122,502.60
  6. Step 6: Final answer
    x = 94,915.27

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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.