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Finding the Fourth Proportional to 66,317.81, 91,491.50 and 40,816.47

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Solution

The fourth proportional to 66,317.81, 91,491.50 and 40,816.47 is: 56,310.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,317.81 : 91,491.50 = 40,816.47 : x
  2. Step 2: Convert to fraction form
    66,317.81/91,491.50 = 40,816.47/x
  3. Step 3: Cross multiply
    66,317.81x = 91,491.50 × 40,816.47
  4. Step 4: Simplify right side
    66,317.81x = 3,734,360,167.05
  5. Step 5: Solve for x
    x = 3,734,360,167.05/66,317.81
  6. Step 6: Final answer
    x = 56,310.06

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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.