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Finding the Fourth Proportional to 122,509.60, 169,052.88 and 68,790.40

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Solution

The fourth proportional to 122,509.60, 169,052.88 and 68,790.40 is: 94,924.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,509.60 : 169,052.88 = 68,790.40 : x
  2. Step 2: Convert to fraction form
    122,509.60/169,052.88 = 68,790.40/x
  3. Step 3: Cross multiply
    122,509.60x = 169,052.88 × 68,790.40
  4. Step 4: Simplify right side
    122,509.60x = 11,629,215,236.35
  5. Step 5: Solve for x
    x = 11,629,215,236.35/122,509.60
  6. Step 6: Final answer
    x = 94,924.93

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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.