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Finding the Fourth Proportional to 98,879.88, 148,066.46 and 68,442.82

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Solution

The fourth proportional to 98,879.88, 148,066.46 and 68,442.82 is: 102,488.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,879.88 : 148,066.46 = 68,442.82 : x
  2. Step 2: Convert to fraction form
    98,879.88/148,066.46 = 68,442.82/x
  3. Step 3: Cross multiply
    98,879.88x = 148,066.46 × 68,442.82
  4. Step 4: Simplify right side
    98,879.88x = 10,134,085,614.10
  5. Step 5: Solve for x
    x = 10,134,085,614.10/98,879.88
  6. Step 6: Final answer
    x = 102,488.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.