Home / 111,979.11-154,531.15-61,678.11

Finding the Fourth Proportional to 111,979.11, 154,531.15 and 61,678.11

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Solution

The fourth proportional to 111,979.11, 154,531.15 and 61,678.11 is: 85,115.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,979.11 : 154,531.15 = 61,678.11 : x
  2. Step 2: Convert to fraction form
    111,979.11/154,531.15 = 61,678.11/x
  3. Step 3: Cross multiply
    111,979.11x = 154,531.15 × 61,678.11
  4. Step 4: Simplify right side
    111,979.11x = 9,531,189,268.13
  5. Step 5: Solve for x
    x = 9,531,189,268.13/111,979.11
  6. Step 6: Final answer
    x = 85,115.78

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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.