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Finding the Fourth Proportional to 66,512.44, 91,805.88 and 39,313.72

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Solution

The fourth proportional to 66,512.44, 91,805.88 and 39,313.72 is: 54,263.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,512.44 : 91,805.88 = 39,313.72 : x
  2. Step 2: Convert to fraction form
    66,512.44/91,805.88 = 39,313.72/x
  3. Step 3: Cross multiply
    66,512.44x = 91,805.88 × 39,313.72
  4. Step 4: Simplify right side
    66,512.44x = 3,609,230,660.67
  5. Step 5: Solve for x
    x = 3,609,230,660.67/66,512.44
  6. Step 6: Final answer
    x = 54,263.99

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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.