Home / 85,687.24-128,536.31-26,517.94

Finding the Fourth Proportional to 85,687.24, 128,536.31 and 26,517.94

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Solution

The fourth proportional to 85,687.24, 128,536.31 and 26,517.94 is: 39,778.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,687.24 : 128,536.31 = 26,517.94 : x
  2. Step 2: Convert to fraction form
    85,687.24/128,536.31 = 26,517.94/x
  3. Step 3: Cross multiply
    85,687.24x = 128,536.31 × 26,517.94
  4. Step 4: Simplify right side
    85,687.24x = 3,408,518,023.81
  5. Step 5: Solve for x
    x = 3,408,518,023.81/85,687.24
  6. Step 6: Final answer
    x = 39,778.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.