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Finding the Fourth Proportional to 57,617.76, 79,578.72 and 38,464.19

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Solution

The fourth proportional to 57,617.76, 79,578.72 and 38,464.19 is: 53,124.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,617.76 : 79,578.72 = 38,464.19 : x
  2. Step 2: Convert to fraction form
    57,617.76/79,578.72 = 38,464.19/x
  3. Step 3: Cross multiply
    57,617.76x = 79,578.72 × 38,464.19
  4. Step 4: Simplify right side
    57,617.76x = 3,060,930,415.82
  5. Step 5: Solve for x
    x = 3,060,930,415.82/57,617.76
  6. Step 6: Final answer
    x = 53,124.77

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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.