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Finding the Fourth Proportional to 107,953.70, 161,711.85 and 61,151.90

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Solution

The fourth proportional to 107,953.70, 161,711.85 and 61,151.90 is: 91,603.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,953.70 : 161,711.85 = 61,151.90 : x
  2. Step 2: Convert to fraction form
    107,953.70/161,711.85 = 61,151.90/x
  3. Step 3: Cross multiply
    107,953.70x = 161,711.85 × 61,151.90
  4. Step 4: Simplify right side
    107,953.70x = 9,888,986,880.02
  5. Step 5: Solve for x
    x = 9,888,986,880.02/107,953.70
  6. Step 6: Final answer
    x = 91,603.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.