Home / 84,086.43-126,126-20,905.23

Finding the Fourth Proportional to 84,086.43, 126,126 and 20,905.23

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Solution

The fourth proportional to 84,086.43, 126,126 and 20,905.23 is: 31,356.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,086.43 : 126,126 = 20,905.23 : x
  2. Step 2: Convert to fraction form
    84,086.43/126,126 = 20,905.23/x
  3. Step 3: Cross multiply
    84,086.43x = 126,126 × 20,905.23
  4. Step 4: Simplify right side
    84,086.43x = 2,636,693,038.98
  5. Step 5: Solve for x
    x = 2,636,693,038.98/84,086.43
  6. Step 6: Final answer
    x = 31,356.94

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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.