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Finding the Fourth Proportional to 60,780.64, 91,170.96 and 48,546.40

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Solution

The fourth proportional to 60,780.64, 91,170.96 and 48,546.40 is: 72,819.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,780.64 : 91,170.96 = 48,546.40 : x
  2. Step 2: Convert to fraction form
    60,780.64/91,170.96 = 48,546.40/x
  3. Step 3: Cross multiply
    60,780.64x = 91,170.96 × 48,546.40
  4. Step 4: Simplify right side
    60,780.64x = 4,426,021,892.54
  5. Step 5: Solve for x
    x = 4,426,021,892.54/60,780.64
  6. Step 6: Final answer
    x = 72,819.60

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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.