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Finding the Fourth Proportional to 84,709.71, 126,814.92 and 74,200.29

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Solution

The fourth proportional to 84,709.71, 126,814.92 and 74,200.29 is: 111,081.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,709.71 : 126,814.92 = 74,200.29 : x
  2. Step 2: Convert to fraction form
    84,709.71/126,814.92 = 74,200.29/x
  3. Step 3: Cross multiply
    84,709.71x = 126,814.92 × 74,200.29
  4. Step 4: Simplify right side
    84,709.71x = 9,409,703,840.33
  5. Step 5: Solve for x
    x = 9,409,703,840.33/84,709.71
  6. Step 6: Final answer
    x = 111,081.76

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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.