Home / 91,605.33-126,378.96-57,129.78

Finding the Fourth Proportional to 91,605.33, 126,378.96 and 57,129.78

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Solution

The fourth proportional to 91,605.33, 126,378.96 and 57,129.78 is: 78,816.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,605.33 : 126,378.96 = 57,129.78 : x
  2. Step 2: Convert to fraction form
    91,605.33/126,378.96 = 57,129.78/x
  3. Step 3: Cross multiply
    91,605.33x = 126,378.96 × 57,129.78
  4. Step 4: Simplify right side
    91,605.33x = 7,220,002,181.43
  5. Step 5: Solve for x
    x = 7,220,002,181.43/91,605.33
  6. Step 6: Final answer
    x = 78,816.40

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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.