Home / 85,744.78-128,612.19-25,771.96

Finding the Fourth Proportional to 85,744.78, 128,612.19 and 25,771.96

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Solution

The fourth proportional to 85,744.78, 128,612.19 and 25,771.96 is: 38,656.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,744.78 : 128,612.19 = 25,771.96 : x
  2. Step 2: Convert to fraction form
    85,744.78/128,612.19 = 25,771.96/x
  3. Step 3: Cross multiply
    85,744.78x = 128,612.19 × 25,771.96
  4. Step 4: Simplify right side
    85,744.78x = 3,314,588,216.19
  5. Step 5: Solve for x
    x = 3,314,588,216.19/85,744.78
  6. Step 6: Final answer
    x = 38,656.44

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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.