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Finding the Fourth Proportional to 87,656.56, 120,990.84 and 51,859.08

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Solution

The fourth proportional to 87,656.56, 120,990.84 and 51,859.08 is: 71,580.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,656.56 : 120,990.84 = 51,859.08 : x
  2. Step 2: Convert to fraction form
    87,656.56/120,990.84 = 51,859.08/x
  3. Step 3: Cross multiply
    87,656.56x = 120,990.84 × 51,859.08
  4. Step 4: Simplify right side
    87,656.56x = 6,274,473,650.83
  5. Step 5: Solve for x
    x = 6,274,473,650.83/87,656.56
  6. Step 6: Final answer
    x = 71,580.19

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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.