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Finding the Fourth Proportional to 99,171, 136,863.27 and 61,452.54

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Solution

The fourth proportional to 99,171, 136,863.27 and 61,452.54 is: 84,809.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,171 : 136,863.27 = 61,452.54 : x
  2. Step 2: Convert to fraction form
    99,171/136,863.27 = 61,452.54/x
  3. Step 3: Cross multiply
    99,171x = 136,863.27 × 61,452.54
  4. Step 4: Simplify right side
    99,171x = 8,410,595,574.21
  5. Step 5: Solve for x
    x = 8,410,595,574.21/99,171
  6. Step 6: Final answer
    x = 84,809.02

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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.