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Finding the Fourth Proportional to 66,484.32, 91,701.39 and 39,606.09

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Solution

The fourth proportional to 66,484.32, 91,701.39 and 39,606.09 is: 54,628.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,484.32 : 91,701.39 = 39,606.09 : x
  2. Step 2: Convert to fraction form
    66,484.32/91,701.39 = 39,606.09/x
  3. Step 3: Cross multiply
    66,484.32x = 91,701.39 × 39,606.09
  4. Step 4: Simplify right side
    66,484.32x = 3,631,933,505.47
  5. Step 5: Solve for x
    x = 3,631,933,505.47/66,484.32
  6. Step 6: Final answer
    x = 54,628.42

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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.