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Finding the Fourth Proportional to 83,616.20, 115,386.66 and 47,808.55

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Solution

The fourth proportional to 83,616.20, 115,386.66 and 47,808.55 is: 65,973.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,616.20 : 115,386.66 = 47,808.55 : x
  2. Step 2: Convert to fraction form
    83,616.20/115,386.66 = 47,808.55/x
  3. Step 3: Cross multiply
    83,616.20x = 115,386.66 × 47,808.55
  4. Step 4: Simplify right side
    83,616.20x = 5,516,468,903.94
  5. Step 5: Solve for x
    x = 5,516,468,903.94/83,616.20
  6. Step 6: Final answer
    x = 65,973.69

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.