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Finding the Fourth Proportional to 66,863.70, 100,295.55 and 31,871.70

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Solution

The fourth proportional to 66,863.70, 100,295.55 and 31,871.70 is: 47,807.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,863.70 : 100,295.55 = 31,871.70 : x
  2. Step 2: Convert to fraction form
    66,863.70/100,295.55 = 31,871.70/x
  3. Step 3: Cross multiply
    66,863.70x = 100,295.55 × 31,871.70
  4. Step 4: Simplify right side
    66,863.70x = 3,196,589,680.94
  5. Step 5: Solve for x
    x = 3,196,589,680.94/66,863.70
  6. Step 6: Final answer
    x = 47,807.55

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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.