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Finding the Fourth Proportional to 66,364.92, 91,576.90 and 40,867.20

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Solution

The fourth proportional to 66,364.92, 91,576.90 and 40,867.20 is: 56,392.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,364.92 : 91,576.90 = 40,867.20 : x
  2. Step 2: Convert to fraction form
    66,364.92/91,576.90 = 40,867.20/x
  3. Step 3: Cross multiply
    66,364.92x = 91,576.90 × 40,867.20
  4. Step 4: Simplify right side
    66,364.92x = 3,742,491,487.68
  5. Step 5: Solve for x
    x = 3,742,491,487.68/66,364.92
  6. Step 6: Final answer
    x = 56,392.62

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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.