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Finding the Fourth Proportional to 101,800.12, 140,618.86 and 84,859.80

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Solution

The fourth proportional to 101,800.12, 140,618.86 and 84,859.80 is: 117,218.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,800.12 : 140,618.86 = 84,859.80 : x
  2. Step 2: Convert to fraction form
    101,800.12/140,618.86 = 84,859.80/x
  3. Step 3: Cross multiply
    101,800.12x = 140,618.86 × 84,859.80
  4. Step 4: Simplify right side
    101,800.12x = 11,932,888,335.83
  5. Step 5: Solve for x
    x = 11,932,888,335.83/101,800.12
  6. Step 6: Final answer
    x = 117,218.80

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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.