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Finding the Fourth Proportional to 115,411.70, 173,140.95 and 65,515.70

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Solution

The fourth proportional to 115,411.70, 173,140.95 and 65,515.70 is: 98,286.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,411.70 : 173,140.95 = 65,515.70 : x
  2. Step 2: Convert to fraction form
    115,411.70/173,140.95 = 65,515.70/x
  3. Step 3: Cross multiply
    115,411.70x = 173,140.95 × 65,515.70
  4. Step 4: Simplify right side
    115,411.70x = 11,343,450,537.92
  5. Step 5: Solve for x
    x = 11,343,450,537.92/115,411.70
  6. Step 6: Final answer
    x = 98,286.83

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1.5x scale

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.