Home / 85,410.90-128,135.55-26,249.30

Finding the Fourth Proportional to 85,410.90, 128,135.55 and 26,249.30

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Solution

The fourth proportional to 85,410.90, 128,135.55 and 26,249.30 is: 39,379.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,410.90 : 128,135.55 = 26,249.30 : x
  2. Step 2: Convert to fraction form
    85,410.90/128,135.55 = 26,249.30/x
  3. Step 3: Cross multiply
    85,410.90x = 128,135.55 × 26,249.30
  4. Step 4: Simplify right side
    85,410.90x = 3,363,468,492.62
  5. Step 5: Solve for x
    x = 3,363,468,492.62/85,410.90
  6. Step 6: Final answer
    x = 39,379.85

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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.