Home / 85,687.37-128,536.49-26,518.07

Finding the Fourth Proportional to 85,687.37, 128,536.49 and 26,518.07

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Solution

The fourth proportional to 85,687.37, 128,536.49 and 26,518.07 is: 39,778.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,687.37 : 128,536.49 = 26,518.07 : x
  2. Step 2: Convert to fraction form
    85,687.37/128,536.49 = 26,518.07/x
  3. Step 3: Cross multiply
    85,687.37x = 128,536.49 × 26,518.07
  4. Step 4: Simplify right side
    85,687.37x = 3,408,539,062.99
  5. Step 5: Solve for x
    x = 3,408,539,062.99/85,687.37
  6. Step 6: Final answer
    x = 39,778.78

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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.