Home / 129,720.48-179,014.50-73,131.72

Finding the Fourth Proportional to 129,720.48, 179,014.50 and 73,131.72

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Solution

The fourth proportional to 129,720.48, 179,014.50 and 73,131.72 is: 100,921.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,720.48 : 179,014.50 = 73,131.72 : x
  2. Step 2: Convert to fraction form
    129,720.48/179,014.50 = 73,131.72/x
  3. Step 3: Cross multiply
    129,720.48x = 179,014.50 × 73,131.72
  4. Step 4: Simplify right side
    129,720.48x = 13,091,638,289.94
  5. Step 5: Solve for x
    x = 13,091,638,289.94/129,720.48
  6. Step 6: Final answer
    x = 100,921.91

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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.