Home / 85,578.12-128,317.77-26,397.90

Finding the Fourth Proportional to 85,578.12, 128,317.77 and 26,397.90

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Solution

The fourth proportional to 85,578.12, 128,317.77 and 26,397.90 is: 39,581.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,578.12 : 128,317.77 = 26,397.90 : x
  2. Step 2: Convert to fraction form
    85,578.12/128,317.77 = 26,397.90/x
  3. Step 3: Cross multiply
    85,578.12x = 128,317.77 × 26,397.90
  4. Step 4: Simplify right side
    85,578.12x = 3,387,319,660.68
  5. Step 5: Solve for x
    x = 3,387,319,660.68/85,578.12
  6. Step 6: Final answer
    x = 39,581.61

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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.