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Finding the Fourth Proportional to 66,506.81, 91,780.71 and 52,183.81

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Solution

The fourth proportional to 66,506.81, 91,780.71 and 52,183.81 is: 72,014.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,506.81 : 91,780.71 = 52,183.81 : x
  2. Step 2: Convert to fraction form
    66,506.81/91,780.71 = 52,183.81/x
  3. Step 3: Cross multiply
    66,506.81x = 91,780.71 × 52,183.81
  4. Step 4: Simplify right side
    66,506.81x = 4,789,466,673.40
  5. Step 5: Solve for x
    x = 4,789,466,673.40/66,506.81
  6. Step 6: Final answer
    x = 72,014.68

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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.