Home / 85,455.28-117,930.12-47,729.60

Finding the Fourth Proportional to 85,455.28, 117,930.12 and 47,729.60

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Solution

The fourth proportional to 85,455.28, 117,930.12 and 47,729.60 is: 65,867.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,455.28 : 117,930.12 = 47,729.60 : x
  2. Step 2: Convert to fraction form
    85,455.28/117,930.12 = 47,729.60/x
  3. Step 3: Cross multiply
    85,455.28x = 117,930.12 × 47,729.60
  4. Step 4: Simplify right side
    85,455.28x = 5,628,757,455.55
  5. Step 5: Solve for x
    x = 5,628,757,455.55/85,455.28
  6. Step 6: Final answer
    x = 65,867.87

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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.