Home / 129,856.50-179,215.74-76,186.71

Finding the Fourth Proportional to 129,856.50, 179,215.74 and 76,186.71

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Solution

The fourth proportional to 129,856.50, 179,215.74 and 76,186.71 is: 105,145.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,856.50 : 179,215.74 = 76,186.71 : x
  2. Step 2: Convert to fraction form
    129,856.50/179,215.74 = 76,186.71/x
  3. Step 3: Cross multiply
    129,856.50x = 179,215.74 × 76,186.71
  4. Step 4: Simplify right side
    129,856.50x = 13,653,857,610.82
  5. Step 5: Solve for x
    x = 13,653,857,610.82/129,856.50
  6. Step 6: Final answer
    x = 105,145.74

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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.