Home / 111,979.41-154,531.57-61,678.41

Finding the Fourth Proportional to 111,979.41, 154,531.57 and 61,678.41

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Solution

The fourth proportional to 111,979.41, 154,531.57 and 61,678.41 is: 85,116.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,979.41 : 154,531.57 = 61,678.41 : x
  2. Step 2: Convert to fraction form
    111,979.41/154,531.57 = 61,678.41/x
  3. Step 3: Cross multiply
    111,979.41x = 154,531.57 × 61,678.41
  4. Step 4: Simplify right side
    111,979.41x = 9,531,261,532.40
  5. Step 5: Solve for x
    x = 9,531,261,532.40/111,979.41
  6. Step 6: Final answer
    x = 85,116.20

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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.