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Finding the Fourth Proportional to 87,054.93, 120,114.78 and 55,212.21

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Solution

The fourth proportional to 87,054.93, 120,114.78 and 55,212.21 is: 76,179.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,054.93 : 120,114.78 = 55,212.21 : x
  2. Step 2: Convert to fraction form
    87,054.93/120,114.78 = 55,212.21/x
  3. Step 3: Cross multiply
    87,054.93x = 120,114.78 × 55,212.21
  4. Step 4: Simplify right side
    87,054.93x = 6,631,802,457.46
  5. Step 5: Solve for x
    x = 6,631,802,457.46/87,054.93
  6. Step 6: Final answer
    x = 76,179.52

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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.