Home / 128,141.92-176,824.08-82,821.28

Finding the Fourth Proportional to 128,141.92, 176,824.08 and 82,821.28

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Solution

The fourth proportional to 128,141.92, 176,824.08 and 82,821.28 is: 114,285.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,141.92 : 176,824.08 = 82,821.28 : x
  2. Step 2: Convert to fraction form
    128,141.92/176,824.08 = 82,821.28/x
  3. Step 3: Cross multiply
    128,141.92x = 176,824.08 × 82,821.28
  4. Step 4: Simplify right side
    128,141.92x = 14,644,796,640.42
  5. Step 5: Solve for x
    x = 14,644,796,640.42/128,141.92
  6. Step 6: Final answer
    x = 114,285.76

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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.