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Finding the Fourth Proportional to 85,578.90, 128,390.22 and 32,974.26

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Solution

The fourth proportional to 85,578.90, 128,390.22 and 32,974.26 is: 49,469.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,578.90 : 128,390.22 = 32,974.26 : x
  2. Step 2: Convert to fraction form
    85,578.90/128,390.22 = 32,974.26/x
  3. Step 3: Cross multiply
    85,578.90x = 128,390.22 × 32,974.26
  4. Step 4: Simplify right side
    85,578.90x = 4,233,572,495.74
  5. Step 5: Solve for x
    x = 4,233,572,495.74/85,578.90
  6. Step 6: Final answer
    x = 49,469.82

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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.