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Finding the Fourth Proportional to 77,952.78, 116,874.74 and 39,928.20

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Solution

The fourth proportional to 77,952.78, 116,874.74 and 39,928.20 is: 59,864.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,952.78 : 116,874.74 = 39,928.20 : x
  2. Step 2: Convert to fraction form
    77,952.78/116,874.74 = 39,928.20/x
  3. Step 3: Cross multiply
    77,952.78x = 116,874.74 × 39,928.20
  4. Step 4: Simplify right side
    77,952.78x = 4,666,597,993.67
  5. Step 5: Solve for x
    x = 4,666,597,993.67/77,952.78
  6. Step 6: Final answer
    x = 59,864.42

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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.