Home / 87,942.72-121,388.51-56,111.56

Finding the Fourth Proportional to 87,942.72, 121,388.51 and 56,111.56

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Solution

The fourth proportional to 87,942.72, 121,388.51 and 56,111.56 is: 77,451.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,942.72 : 121,388.51 = 56,111.56 : x
  2. Step 2: Convert to fraction form
    87,942.72/121,388.51 = 56,111.56/x
  3. Step 3: Cross multiply
    87,942.72x = 121,388.51 × 56,111.56
  4. Step 4: Simplify right side
    87,942.72x = 6,811,298,662.18
  5. Step 5: Solve for x
    x = 6,811,298,662.18/87,942.72
  6. Step 6: Final answer
    x = 77,451.54

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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.