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Finding the Fourth Proportional to 66,207.35, 91,379.42 and 39,344.67

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Solution

The fourth proportional to 66,207.35, 91,379.42 and 39,344.67 is: 54,303.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,207.35 : 91,379.42 = 39,344.67 : x
  2. Step 2: Convert to fraction form
    66,207.35/91,379.42 = 39,344.67/x
  3. Step 3: Cross multiply
    66,207.35x = 91,379.42 × 39,344.67
  4. Step 4: Simplify right side
    66,207.35x = 3,595,292,927.97
  5. Step 5: Solve for x
    x = 3,595,292,927.97/66,207.35
  6. Step 6: Final answer
    x = 54,303.54

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1.5x scale

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.