Home / 84,387.40-126,629.70-31,834.60

Finding the Fourth Proportional to 84,387.40, 126,629.70 and 31,834.60

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Solution

The fourth proportional to 84,387.40, 126,629.70 and 31,834.60 is: 47,770.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,387.40 : 126,629.70 = 31,834.60 : x
  2. Step 2: Convert to fraction form
    84,387.40/126,629.70 = 31,834.60/x
  3. Step 3: Cross multiply
    84,387.40x = 126,629.70 × 31,834.60
  4. Step 4: Simplify right side
    84,387.40x = 4,031,205,847.62
  5. Step 5: Solve for x
    x = 4,031,205,847.62/84,387.40
  6. Step 6: Final answer
    x = 47,770.23

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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.