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Finding the Fourth Proportional to 128,279.91, 176,910.91 and 82,910.19

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Solution

The fourth proportional to 128,279.91, 176,910.91 and 82,910.19 is: 114,341.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,279.91 : 176,910.91 = 82,910.19 : x
  2. Step 2: Convert to fraction form
    128,279.91/176,910.91 = 82,910.19/x
  3. Step 3: Cross multiply
    128,279.91x = 176,910.91 × 82,910.19
  4. Step 4: Simplify right side
    128,279.91x = 14,667,717,161.17
  5. Step 5: Solve for x
    x = 14,667,717,161.17/128,279.91
  6. Step 6: Final answer
    x = 114,341.50

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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.