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Finding the Fourth Proportional to 87,474.72, 120,674.16 and 51,640.32

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Solution

The fourth proportional to 87,474.72, 120,674.16 and 51,640.32 is: 71,239.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,474.72 : 120,674.16 = 51,640.32 : x
  2. Step 2: Convert to fraction form
    87,474.72/120,674.16 = 51,640.32/x
  3. Step 3: Cross multiply
    87,474.72x = 120,674.16 × 51,640.32
  4. Step 4: Simplify right side
    87,474.72x = 6,231,652,238.13
  5. Step 5: Solve for x
    x = 6,231,652,238.13/87,474.72
  6. Step 6: Final answer
    x = 71,239.46

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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.