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Finding the Fourth Proportional to 66,438.52, 91,684.47 and 36,223.75

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Solution

The fourth proportional to 66,438.52, 91,684.47 and 36,223.75 is: 49,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438.52 : 91,684.47 = 36,223.75 : x
  2. Step 2: Convert to fraction form
    66,438.52/91,684.47 = 36,223.75/x
  3. Step 3: Cross multiply
    66,438.52x = 91,684.47 × 36,223.75
  4. Step 4: Simplify right side
    66,438.52x = 3,321,155,320.16
  5. Step 5: Solve for x
    x = 3,321,155,320.16/66,438.52
  6. Step 6: Final answer
    x = 49,988.40

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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.