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Finding the Fourth Proportional to 131,717.80, 181,721.64 and 83,960.20

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Solution

The fourth proportional to 131,717.80, 181,721.64 and 83,960.20 is: 115,833.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,717.80 : 181,721.64 = 83,960.20 : x
  2. Step 2: Convert to fraction form
    131,717.80/181,721.64 = 83,960.20/x
  3. Step 3: Cross multiply
    131,717.80x = 181,721.64 × 83,960.20
  4. Step 4: Simplify right side
    131,717.80x = 15,257,385,238.73
  5. Step 5: Solve for x
    x = 15,257,385,238.73/131,717.80
  6. Step 6: Final answer
    x = 115,833.89

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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.