Home / 129,805.20-179,133.50-76,128.92

Finding the Fourth Proportional to 129,805.20, 179,133.50 and 76,128.92

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Solution

The fourth proportional to 129,805.20, 179,133.50 and 76,128.92 is: 105,059.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,805.20 : 179,133.50 = 76,128.92 : x
  2. Step 2: Convert to fraction form
    129,805.20/179,133.50 = 76,128.92/x
  3. Step 3: Cross multiply
    129,805.20x = 179,133.50 × 76,128.92
  4. Step 4: Simplify right side
    129,805.20x = 13,637,239,890.82
  5. Step 5: Solve for x
    x = 13,637,239,890.82/129,805.20
  6. Step 6: Final answer
    x = 105,059.27

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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.