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Finding the Fourth Proportional to 92,908.55, 128,216.17 and 52,621.71

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Solution

The fourth proportional to 92,908.55, 128,216.17 and 52,621.71 is: 72,619.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,908.55 : 128,216.17 = 52,621.71 : x
  2. Step 2: Convert to fraction form
    92,908.55/128,216.17 = 52,621.71/x
  3. Step 3: Cross multiply
    92,908.55x = 128,216.17 × 52,621.71
  4. Step 4: Simplify right side
    92,908.55x = 6,746,954,115.05
  5. Step 5: Solve for x
    x = 6,746,954,115.05/92,908.55
  6. Step 6: Final answer
    x = 72,619.30

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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.