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Finding the Fourth Proportional to 66,668.52, 92,013.72 and 38,368.20

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Solution

The fourth proportional to 66,668.52, 92,013.72 and 38,368.20 is: 52,954.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,668.52 : 92,013.72 = 38,368.20 : x
  2. Step 2: Convert to fraction form
    66,668.52/92,013.72 = 38,368.20/x
  3. Step 3: Cross multiply
    66,668.52x = 92,013.72 × 38,368.20
  4. Step 4: Simplify right side
    66,668.52x = 3,530,400,811.70
  5. Step 5: Solve for x
    x = 3,530,400,811.70/66,668.52
  6. Step 6: Final answer
    x = 52,954.54

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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.