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Finding the Fourth Proportional to 66,243.20, 91,428.16 and 37,951.68

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Solution

The fourth proportional to 66,243.20, 91,428.16 and 37,951.68 is: 52,380.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,243.20 : 91,428.16 = 37,951.68 : x
  2. Step 2: Convert to fraction form
    66,243.20/91,428.16 = 37,951.68/x
  3. Step 3: Cross multiply
    66,243.20x = 91,428.16 × 37,951.68
  4. Step 4: Simplify right side
    66,243.20x = 3,469,852,271.31
  5. Step 5: Solve for x
    x = 3,469,852,271.31/66,243.20
  6. Step 6: Final answer
    x = 52,380.51

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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.