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Finding the Fourth Proportional to 139,803.39, 192,930.88 and 76,141.14

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Solution

The fourth proportional to 139,803.39, 192,930.88 and 76,141.14 is: 105,075.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,803.39 : 192,930.88 = 76,141.14 : x
  2. Step 2: Convert to fraction form
    139,803.39/192,930.88 = 76,141.14/x
  3. Step 3: Cross multiply
    139,803.39x = 192,930.88 × 76,141.14
  4. Step 4: Simplify right side
    139,803.39x = 14,689,977,144.40
  5. Step 5: Solve for x
    x = 14,689,977,144.40/139,803.39
  6. Step 6: Final answer
    x = 105,075.97

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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.