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Finding the Fourth Proportional to 66,463.99, 91,717.07 and 39,605.90

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Solution

The fourth proportional to 66,463.99, 91,717.07 and 39,605.90 is: 54,654.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,463.99 : 91,717.07 = 39,605.90 : x
  2. Step 2: Convert to fraction form
    66,463.99/91,717.07 = 39,605.90/x
  3. Step 3: Cross multiply
    66,463.99x = 91,717.07 × 39,605.90
  4. Step 4: Simplify right side
    66,463.99x = 3,632,537,102.71
  5. Step 5: Solve for x
    x = 3,632,537,102.71/66,463.99
  6. Step 6: Final answer
    x = 54,654.21

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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.