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Finding the Fourth Proportional to 66,668.52, 91,942.90 and 55,319.96

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Solution

The fourth proportional to 66,668.52, 91,942.90 and 55,319.96 is: 76,292.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,668.52 : 91,942.90 = 55,319.96 : x
  2. Step 2: Convert to fraction form
    66,668.52/91,942.90 = 55,319.96/x
  3. Step 3: Cross multiply
    66,668.52x = 91,942.90 × 55,319.96
  4. Step 4: Simplify right side
    66,668.52x = 5,086,277,550.28
  5. Step 5: Solve for x
    x = 5,086,277,550.28/66,668.52
  6. Step 6: Final answer
    x = 76,292.04

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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.