Home / 90,945.21-125,505.95-55,136.73

Finding the Fourth Proportional to 90,945.21, 125,505.95 and 55,136.73

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Solution

The fourth proportional to 90,945.21, 125,505.95 and 55,136.73 is: 76,089.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,945.21 : 125,505.95 = 55,136.73 : x
  2. Step 2: Convert to fraction form
    90,945.21/125,505.95 = 55,136.73/x
  3. Step 3: Cross multiply
    90,945.21x = 125,505.95 × 55,136.73
  4. Step 4: Simplify right side
    90,945.21x = 6,919,987,402.86
  5. Step 5: Solve for x
    x = 6,919,987,402.86/90,945.21
  6. Step 6: Final answer
    x = 76,089.63

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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.