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Finding the Fourth Proportional to 84,661.71, 126,995.25 and 31,367.03

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Solution

The fourth proportional to 84,661.71, 126,995.25 and 31,367.03 is: 47,051.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,661.71 : 126,995.25 = 31,367.03 : x
  2. Step 2: Convert to fraction form
    84,661.71/126,995.25 = 31,367.03/x
  3. Step 3: Cross multiply
    84,661.71x = 126,995.25 × 31,367.03
  4. Step 4: Simplify right side
    84,661.71x = 3,983,463,816.61
  5. Step 5: Solve for x
    x = 3,983,463,816.61/84,661.71
  6. Step 6: Final answer
    x = 47,051.54

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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.