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Finding the Fourth Proportional to 84,081.81, 126,119.06 and 20,900.59

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Solution

The fourth proportional to 84,081.81, 126,119.06 and 20,900.59 is: 31,349.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,081.81 : 126,119.06 = 20,900.59 : x
  2. Step 2: Convert to fraction form
    84,081.81/126,119.06 = 20,900.59/x
  3. Step 3: Cross multiply
    84,081.81x = 126,119.06 × 20,900.59
  4. Step 4: Simplify right side
    84,081.81x = 2,635,962,764.25
  5. Step 5: Solve for x
    x = 2,635,962,764.25/84,081.81
  6. Step 6: Final answer
    x = 31,349.98

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1.5x scale

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.