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Finding the Fourth Proportional to 55,772.36, 83,691.18 and 20,736.20

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Solution

The fourth proportional to 55,772.36, 83,691.18 and 20,736.20 is: 31,116.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,772.36 : 83,691.18 = 20,736.20 : x
  2. Step 2: Convert to fraction form
    55,772.36/83,691.18 = 20,736.20/x
  3. Step 3: Cross multiply
    55,772.36x = 83,691.18 × 20,736.20
  4. Step 4: Simplify right side
    55,772.36x = 1,735,437,046.72
  5. Step 5: Solve for x
    x = 1,735,437,046.72/55,772.36
  6. Step 6: Final answer
    x = 31,116.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.