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Finding the Fourth Proportional to 66,648.15, 91,971.90 and 36,433.17

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Solution

The fourth proportional to 66,648.15, 91,971.90 and 36,433.17 is: 50,276.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,648.15 : 91,971.90 = 36,433.17 : x
  2. Step 2: Convert to fraction form
    66,648.15/91,971.90 = 36,433.17/x
  3. Step 3: Cross multiply
    66,648.15x = 91,971.90 × 36,433.17
  4. Step 4: Simplify right side
    66,648.15x = 3,350,827,867.92
  5. Step 5: Solve for x
    x = 3,350,827,867.92/66,648.15
  6. Step 6: Final answer
    x = 50,276.38

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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.