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Finding the Fourth Proportional to 66,261.62, 91,410.92 and 39,388.86

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Solution

The fourth proportional to 66,261.62, 91,410.92 and 39,388.86 is: 54,338.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,261.62 : 91,410.92 = 39,388.86 : x
  2. Step 2: Convert to fraction form
    66,261.62/91,410.92 = 39,388.86/x
  3. Step 3: Cross multiply
    66,261.62x = 91,410.92 × 39,388.86
  4. Step 4: Simplify right side
    66,261.62x = 3,600,571,930.35
  5. Step 5: Solve for x
    x = 3,600,571,930.35/66,261.62
  6. Step 6: Final answer
    x = 54,338.72

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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.