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Finding the Fourth Proportional to 122,513.60, 169,062.72 and 68,800.88

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Solution

The fourth proportional to 122,513.60, 169,062.72 and 68,800.88 is: 94,941.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,513.60 : 169,062.72 = 68,800.88 : x
  2. Step 2: Convert to fraction form
    122,513.60/169,062.72 = 68,800.88/x
  3. Step 3: Cross multiply
    122,513.60x = 169,062.72 × 68,800.88
  4. Step 4: Simplify right side
    122,513.60x = 11,631,663,911.19
  5. Step 5: Solve for x
    x = 11,631,663,911.19/122,513.60
  6. Step 6: Final answer
    x = 94,941.82

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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.