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Finding the Fourth Proportional to 87,120.56, 120,208.06 and 56,950.30

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Solution

The fourth proportional to 87,120.56, 120,208.06 and 56,950.30 is: 78,579.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,120.56 : 120,208.06 = 56,950.30 : x
  2. Step 2: Convert to fraction form
    87,120.56/120,208.06 = 56,950.30/x
  3. Step 3: Cross multiply
    87,120.56x = 120,208.06 × 56,950.30
  4. Step 4: Simplify right side
    87,120.56x = 6,845,885,079.42
  5. Step 5: Solve for x
    x = 6,845,885,079.42/87,120.56
  6. Step 6: Final answer
    x = 78,579.44

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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.