Home / 87,087.18-120,067.52-56,405.68

Finding the Fourth Proportional to 87,087.18, 120,067.52 and 56,405.68

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Solution

The fourth proportional to 87,087.18, 120,067.52 and 56,405.68 is: 77,766.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,087.18 : 120,067.52 = 56,405.68 : x
  2. Step 2: Convert to fraction form
    87,087.18/120,067.52 = 56,405.68/x
  3. Step 3: Cross multiply
    87,087.18x = 120,067.52 × 56,405.68
  4. Step 4: Simplify right side
    87,087.18x = 6,772,490,111.51
  5. Step 5: Solve for x
    x = 6,772,490,111.51/87,087.18
  6. Step 6: Final answer
    x = 77,766.79

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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.