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Finding the Fourth Proportional to 47,778.61, 65,929.13 and 28,659.17

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Solution

The fourth proportional to 47,778.61, 65,929.13 and 28,659.17 is: 39,546.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,778.61 : 65,929.13 = 28,659.17 : x
  2. Step 2: Convert to fraction form
    47,778.61/65,929.13 = 28,659.17/x
  3. Step 3: Cross multiply
    47,778.61x = 65,929.13 × 28,659.17
  4. Step 4: Simplify right side
    47,778.61x = 1,889,473,671.68
  5. Step 5: Solve for x
    x = 1,889,473,671.68/47,778.61
  6. Step 6: Final answer
    x = 39,546.44

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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.