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Finding the Fourth Proportional to 91,806.78, 126,808.83 and 75,732.33

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Solution

The fourth proportional to 91,806.78, 126,808.83 and 75,732.33 is: 104,605.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,806.78 : 126,808.83 = 75,732.33 : x
  2. Step 2: Convert to fraction form
    91,806.78/126,808.83 = 75,732.33/x
  3. Step 3: Cross multiply
    91,806.78x = 126,808.83 × 75,732.33
  4. Step 4: Simplify right side
    91,806.78x = 9,603,528,160.47
  5. Step 5: Solve for x
    x = 9,603,528,160.47/91,806.78
  6. Step 6: Final answer
    x = 104,605.87

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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.