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Finding the Fourth Proportional to 91,806.70, 137,710.05 and 76,935.10

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Solution

The fourth proportional to 91,806.70, 137,710.05 and 76,935.10 is: 115,402.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,806.70 : 137,710.05 = 76,935.10 : x
  2. Step 2: Convert to fraction form
    91,806.70/137,710.05 = 76,935.10/x
  3. Step 3: Cross multiply
    91,806.70x = 137,710.05 × 76,935.10
  4. Step 4: Simplify right side
    91,806.70x = 10,594,736,467.76
  5. Step 5: Solve for x
    x = 10,594,736,467.76/91,806.70
  6. Step 6: Final answer
    x = 115,402.65

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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.