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Finding the Fourth Proportional to 66,636.81, 91,949.99 and 42,795.81

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Solution

The fourth proportional to 66,636.81, 91,949.99 and 42,795.81 is: 59,052.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,636.81 : 91,949.99 = 42,795.81 : x
  2. Step 2: Convert to fraction form
    66,636.81/91,949.99 = 42,795.81/x
  3. Step 3: Cross multiply
    66,636.81x = 91,949.99 × 42,795.81
  4. Step 4: Simplify right side
    66,636.81x = 3,935,074,087.56
  5. Step 5: Solve for x
    x = 3,935,074,087.56/66,636.81
  6. Step 6: Final answer
    x = 59,052.56

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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.