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Finding the Fourth Proportional to 91,808.78, 126,811.60 and 75,734.34

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Solution

The fourth proportional to 91,808.78, 126,811.60 and 75,734.34 is: 104,608.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,808.78 : 126,811.60 = 75,734.34 : x
  2. Step 2: Convert to fraction form
    91,808.78/126,811.60 = 75,734.34/x
  3. Step 3: Cross multiply
    91,808.78x = 126,811.60 × 75,734.34
  4. Step 4: Simplify right side
    91,808.78x = 9,603,992,830.34
  5. Step 5: Solve for x
    x = 9,603,992,830.34/91,808.78
  6. Step 6: Final answer
    x = 104,608.65

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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.