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Finding the Fourth Proportional to 78,963.16, 108,936.60 and 55,103.68

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Solution

The fourth proportional to 78,963.16, 108,936.60 and 55,103.68 is: 76,020.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,963.16 : 108,936.60 = 55,103.68 : x
  2. Step 2: Convert to fraction form
    78,963.16/108,936.60 = 55,103.68/x
  3. Step 3: Cross multiply
    78,963.16x = 108,936.60 × 55,103.68
  4. Step 4: Simplify right side
    78,963.16x = 6,002,807,546.69
  5. Step 5: Solve for x
    x = 6,002,807,546.69/78,963.16
  6. Step 6: Final answer
    x = 76,020.36

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1.5x scale

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.