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Finding the Fourth Proportional to 78,924.66, 117,811.28 and 68,960.04

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Solution

The fourth proportional to 78,924.66, 117,811.28 and 68,960.04 is: 102,937.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,924.66 : 117,811.28 = 68,960.04 : x
  2. Step 2: Convert to fraction form
    78,924.66/117,811.28 = 68,960.04/x
  3. Step 3: Cross multiply
    78,924.66x = 117,811.28 × 68,960.04
  4. Step 4: Simplify right side
    78,924.66x = 8,124,270,236.45
  5. Step 5: Solve for x
    x = 8,124,270,236.45/78,924.66
  6. Step 6: Final answer
    x = 102,937.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.