Home / 131,687.91-197,146.31-81,616.95

Finding the Fourth Proportional to 131,687.91, 197,146.31 and 81,616.95

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Solution

The fourth proportional to 131,687.91, 197,146.31 and 81,616.95 is: 122,186.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,687.91 : 197,146.31 = 81,616.95 : x
  2. Step 2: Convert to fraction form
    131,687.91/197,146.31 = 81,616.95/x
  3. Step 3: Cross multiply
    131,687.91x = 197,146.31 × 81,616.95
  4. Step 4: Simplify right side
    131,687.91x = 16,090,480,117.87
  5. Step 5: Solve for x
    x = 16,090,480,117.87/131,687.91
  6. Step 6: Final answer
    x = 122,186.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.