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Finding the Fourth Proportional to 66,197.80, 91,338.48 and 39,349.24

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Solution

The fourth proportional to 66,197.80, 91,338.48 and 39,349.24 is: 54,293.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,197.80 : 91,338.48 = 39,349.24 : x
  2. Step 2: Convert to fraction form
    66,197.80/91,338.48 = 39,349.24/x
  3. Step 3: Cross multiply
    66,197.80x = 91,338.48 × 39,349.24
  4. Step 4: Simplify right side
    66,197.80x = 3,594,099,770.76
  5. Step 5: Solve for x
    x = 3,594,099,770.76/66,197.80
  6. Step 6: Final answer
    x = 54,293.34

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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.