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Finding the Fourth Proportional to 135,603.72, 187,220.97 and 87,227.28

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Solution

The fourth proportional to 135,603.72, 187,220.97 and 87,227.28 is: 120,430.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,603.72 : 187,220.97 = 87,227.28 : x
  2. Step 2: Convert to fraction form
    135,603.72/187,220.97 = 87,227.28/x
  3. Step 3: Cross multiply
    135,603.72x = 187,220.97 × 87,227.28
  4. Step 4: Simplify right side
    135,603.72x = 16,330,775,972.06
  5. Step 5: Solve for x
    x = 16,330,775,972.06/135,603.72
  6. Step 6: Final answer
    x = 120,430.15

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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.