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Finding the Fourth Proportional to 91,395, 125,844.71 and 80,000.73

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Solution

The fourth proportional to 91,395, 125,844.71 and 80,000.73 is: 110,155.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,395 : 125,844.71 = 80,000.73 : x
  2. Step 2: Convert to fraction form
    91,395/125,844.71 = 80,000.73/x
  3. Step 3: Cross multiply
    91,395x = 125,844.71 × 80,000.73
  4. Step 4: Simplify right side
    91,395x = 10,067,668,266.63
  5. Step 5: Solve for x
    x = 10,067,668,266.63/91,395
  6. Step 6: Final answer
    x = 110,155.57

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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.