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Finding the Fourth Proportional to 101,898.48, 140,620.44 and 57,186.48

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Solution

The fourth proportional to 101,898.48, 140,620.44 and 57,186.48 is: 78,917.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,898.48 : 140,620.44 = 57,186.48 : x
  2. Step 2: Convert to fraction form
    101,898.48/140,620.44 = 57,186.48/x
  3. Step 3: Cross multiply
    101,898.48x = 140,620.44 × 57,186.48
  4. Step 4: Simplify right side
    101,898.48x = 8,041,587,979.65
  5. Step 5: Solve for x
    x = 8,041,587,979.65/101,898.48
  6. Step 6: Final answer
    x = 78,917.64

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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.