Home / 84,117.51-126,139.34-31,490.09

Finding the Fourth Proportional to 84,117.51, 126,139.34 and 31,490.09

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Solution

The fourth proportional to 84,117.51, 126,139.34 and 31,490.09 is: 47,221.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,117.51 : 126,139.34 = 31,490.09 : x
  2. Step 2: Convert to fraction form
    84,117.51/126,139.34 = 31,490.09/x
  3. Step 3: Cross multiply
    84,117.51x = 126,139.34 × 31,490.09
  4. Step 4: Simplify right side
    84,117.51x = 3,972,138,380.99
  5. Step 5: Solve for x
    x = 3,972,138,380.99/84,117.51
  6. Step 6: Final answer
    x = 47,221.30

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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.