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Finding the Fourth Proportional to 66,422.81, 91,663.50 and 36,208.10

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Solution

The fourth proportional to 66,422.81, 91,663.50 and 36,208.10 is: 49,967.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.81 : 91,663.50 = 36,208.10 : x
  2. Step 2: Convert to fraction form
    66,422.81/91,663.50 = 36,208.10/x
  3. Step 3: Cross multiply
    66,422.81x = 91,663.50 × 36,208.10
  4. Step 4: Simplify right side
    66,422.81x = 3,318,960,716.03
  5. Step 5: Solve for x
    x = 3,318,960,716.03/66,422.81
  6. Step 6: Final answer
    x = 49,967.19

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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.