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Finding the Fourth Proportional to 66,940.84, 100,288.86 and 31,336.84

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Solution

The fourth proportional to 66,940.84, 100,288.86 and 31,336.84 is: 46,947.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,940.84 : 100,288.86 = 31,336.84 : x
  2. Step 2: Convert to fraction form
    66,940.84/100,288.86 = 31,336.84/x
  3. Step 3: Cross multiply
    66,940.84x = 100,288.86 × 31,336.84
  4. Step 4: Simplify right side
    66,940.84x = 3,142,735,959.60
  5. Step 5: Solve for x
    x = 3,142,735,959.60/66,940.84
  6. Step 6: Final answer
    x = 46,947.96

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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.