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Finding the Fourth Proportional to 66,506.70, 99,631.41 and 55,704.81

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Solution

The fourth proportional to 66,506.70, 99,631.41 and 55,704.81 is: 83,449.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,506.70 : 99,631.41 = 55,704.81 : x
  2. Step 2: Convert to fraction form
    66,506.70/99,631.41 = 55,704.81/x
  3. Step 3: Cross multiply
    66,506.70x = 99,631.41 × 55,704.81
  4. Step 4: Simplify right side
    66,506.70x = 5,549,948,764.08
  5. Step 5: Solve for x
    x = 5,549,948,764.08/66,506.70
  6. Step 6: Final answer
    x = 83,449.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.