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Finding the Fourth Proportional to 129,777, 179,118.34 and 73,189.48

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Solution

The fourth proportional to 129,777, 179,118.34 and 73,189.48 is: 101,016.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,777 : 179,118.34 = 73,189.48 : x
  2. Step 2: Convert to fraction form
    129,777/179,118.34 = 73,189.48/x
  3. Step 3: Cross multiply
    129,777x = 179,118.34 × 73,189.48
  4. Step 4: Simplify right side
    129,777x = 13,109,578,163.06
  5. Step 5: Solve for x
    x = 13,109,578,163.06/129,777
  6. Step 6: Final answer
    x = 101,016.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.