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Finding the Fourth Proportional to 66,647.28, 91,973.30 and 38,352.96

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Solution

The fourth proportional to 66,647.28, 91,973.30 and 38,352.96 is: 52,927.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,647.28 : 91,973.30 = 38,352.96 : x
  2. Step 2: Convert to fraction form
    66,647.28/91,973.30 = 38,352.96/x
  3. Step 3: Cross multiply
    66,647.28x = 91,973.30 × 38,352.96
  4. Step 4: Simplify right side
    66,647.28x = 3,527,448,295.97
  5. Step 5: Solve for x
    x = 3,527,448,295.97/66,647.28
  6. Step 6: Final answer
    x = 52,927.12

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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.