Home / 78,526.53-117,789.26-31,778.73

Finding the Fourth Proportional to 78,526.53, 117,789.26 and 31,778.73

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Solution

The fourth proportional to 78,526.53, 117,789.26 and 31,778.73 is: 47,667.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,526.53 : 117,789.26 = 31,778.73 : x
  2. Step 2: Convert to fraction form
    78,526.53/117,789.26 = 31,778.73/x
  3. Step 3: Cross multiply
    78,526.53x = 117,789.26 × 31,778.73
  4. Step 4: Simplify right side
    78,526.53x = 3,743,192,931.55
  5. Step 5: Solve for x
    x = 3,743,192,931.55/78,526.53
  6. Step 6: Final answer
    x = 47,667.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.