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Finding the Fourth Proportional to 87,102.96, 120,203.28 and 65,260.56

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Solution

The fourth proportional to 87,102.96, 120,203.28 and 65,260.56 is: 90,060.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,102.96 : 120,203.28 = 65,260.56 : x
  2. Step 2: Convert to fraction form
    87,102.96/120,203.28 = 65,260.56/x
  3. Step 3: Cross multiply
    87,102.96x = 120,203.28 × 65,260.56
  4. Step 4: Simplify right side
    87,102.96x = 7,844,533,366.64
  5. Step 5: Solve for x
    x = 7,844,533,366.64/87,102.96
  6. Step 6: Final answer
    x = 90,060.47

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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.