Home / 84,117.26-126,138.96-31,489.84

Finding the Fourth Proportional to 84,117.26, 126,138.96 and 31,489.84

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Solution

The fourth proportional to 84,117.26, 126,138.96 and 31,489.84 is: 47,220.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,117.26 : 126,138.96 = 31,489.84 : x
  2. Step 2: Convert to fraction form
    84,117.26/126,138.96 = 31,489.84/x
  3. Step 3: Cross multiply
    84,117.26x = 126,138.96 × 31,489.84
  4. Step 4: Simplify right side
    84,117.26x = 3,972,095,037.47
  5. Step 5: Solve for x
    x = 3,972,095,037.47/84,117.26
  6. Step 6: Final answer
    x = 47,220.93

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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.