Home / 85,689.37-128,539.49-26,520.07

Finding the Fourth Proportional to 85,689.37, 128,539.49 and 26,520.07

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Solution

The fourth proportional to 85,689.37, 128,539.49 and 26,520.07 is: 39,781.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,689.37 : 128,539.49 = 26,520.07 : x
  2. Step 2: Convert to fraction form
    85,689.37/128,539.49 = 26,520.07/x
  3. Step 3: Cross multiply
    85,689.37x = 128,539.49 × 26,520.07
  4. Step 4: Simplify right side
    85,689.37x = 3,408,876,272.56
  5. Step 5: Solve for x
    x = 3,408,876,272.56/85,689.37
  6. Step 6: Final answer
    x = 39,781.79

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1.5x scale

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.