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Finding the Fourth Proportional to 55,672.81, 76,725.45 and 39,540.83

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Solution

The fourth proportional to 55,672.81, 76,725.45 and 39,540.83 is: 54,493.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,672.81 : 76,725.45 = 39,540.83 : x
  2. Step 2: Convert to fraction form
    55,672.81/76,725.45 = 39,540.83/x
  3. Step 3: Cross multiply
    55,672.81x = 76,725.45 × 39,540.83
  4. Step 4: Simplify right side
    55,672.81x = 3,033,787,975.12
  5. Step 5: Solve for x
    x = 3,033,787,975.12/55,672.81
  6. Step 6: Final answer
    x = 54,493.17

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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.