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Finding the Fourth Proportional to 66,653.48, 91,982.90 and 39,798.34

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Solution

The fourth proportional to 66,653.48, 91,982.90 and 39,798.34 is: 54,922.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,653.48 : 91,982.90 = 39,798.34 : x
  2. Step 2: Convert to fraction form
    66,653.48/91,982.90 = 39,798.34/x
  3. Step 3: Cross multiply
    66,653.48x = 91,982.90 × 39,798.34
  4. Step 4: Simplify right side
    66,653.48x = 3,660,766,597.92
  5. Step 5: Solve for x
    x = 3,660,766,597.92/66,653.48
  6. Step 6: Final answer
    x = 54,922.36

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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.