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Finding the Fourth Proportional to 91,161.98, 125,800.25 and 57,188.76

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Solution

The fourth proportional to 91,161.98, 125,800.25 and 57,188.76 is: 78,918.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,161.98 : 125,800.25 = 57,188.76 : x
  2. Step 2: Convert to fraction form
    91,161.98/125,800.25 = 57,188.76/x
  3. Step 3: Cross multiply
    91,161.98x = 125,800.25 × 57,188.76
  4. Step 4: Simplify right side
    91,161.98x = 7,194,360,019.25
  5. Step 5: Solve for x
    x = 7,194,360,019.25/91,161.98
  6. Step 6: Final answer
    x = 78,918.43

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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.