Home / 129,871.13-179,220.41-72,511.33

Finding the Fourth Proportional to 129,871.13, 179,220.41 and 72,511.33

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Solution

The fourth proportional to 129,871.13, 179,220.41 and 72,511.33 is: 100,064.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,871.13 : 179,220.41 = 72,511.33 : x
  2. Step 2: Convert to fraction form
    129,871.13/179,220.41 = 72,511.33/x
  3. Step 3: Cross multiply
    129,871.13x = 179,220.41 × 72,511.33
  4. Step 4: Simplify right side
    129,871.13x = 12,995,509,481.64
  5. Step 5: Solve for x
    x = 12,995,509,481.64/129,871.13
  6. Step 6: Final answer
    x = 100,064.66

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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.