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Finding the Fourth Proportional to 140,995.40, 194,580.78 and 77,339.12

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Solution

The fourth proportional to 140,995.40, 194,580.78 and 77,339.12 is: 106,731.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,995.40 : 194,580.78 = 77,339.12 : x
  2. Step 2: Convert to fraction form
    140,995.40/194,580.78 = 77,339.12/x
  3. Step 3: Cross multiply
    140,995.40x = 194,580.78 × 77,339.12
  4. Step 4: Simplify right side
    140,995.40x = 15,048,706,294.11
  5. Step 5: Solve for x
    x = 15,048,706,294.11/140,995.40
  6. Step 6: Final answer
    x = 106,731.90

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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.