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Finding the Fourth Proportional to 127,383.76, 191,108.28 and 90,018

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Solution

The fourth proportional to 127,383.76, 191,108.28 and 90,018 is: 135,050.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,383.76 : 191,108.28 = 90,018 : x
  2. Step 2: Convert to fraction form
    127,383.76/191,108.28 = 90,018/x
  3. Step 3: Cross multiply
    127,383.76x = 191,108.28 × 90,018
  4. Step 4: Simplify right side
    127,383.76x = 17,203,185,149.04
  5. Step 5: Solve for x
    x = 17,203,185,149.04/127,383.76
  6. Step 6: Final answer
    x = 135,050.07

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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.