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Finding the Fourth Proportional to 84,879.32, 126,696.59 and 74,916.32

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Solution

The fourth proportional to 84,879.32, 126,696.59 and 74,916.32 is: 111,825.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,879.32 : 126,696.59 = 74,916.32 : x
  2. Step 2: Convert to fraction form
    84,879.32/126,696.59 = 74,916.32/x
  3. Step 3: Cross multiply
    84,879.32x = 126,696.59 × 74,916.32
  4. Step 4: Simplify right side
    84,879.32x = 9,491,641,271.28
  5. Step 5: Solve for x
    x = 9,491,641,271.28/84,879.32
  6. Step 6: Final answer
    x = 111,825.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.