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Finding the Fourth Proportional to 128,215.38, 176,932.06 and 74,496.17

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Solution

The fourth proportional to 128,215.38, 176,932.06 and 74,496.17 is: 102,801.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,215.38 : 176,932.06 = 74,496.17 : x
  2. Step 2: Convert to fraction form
    128,215.38/176,932.06 = 74,496.17/x
  3. Step 3: Cross multiply
    128,215.38x = 176,932.06 × 74,496.17
  4. Step 4: Simplify right side
    128,215.38x = 13,180,760,434.63
  5. Step 5: Solve for x
    x = 13,180,760,434.63/128,215.38
  6. Step 6: Final answer
    x = 102,801.71

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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.