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Finding the Fourth Proportional to 352,138.80, 528,203.40 and 115,489.20

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Solution

The fourth proportional to 352,138.80, 528,203.40 and 115,489.20 is: 173,232.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,138.80 : 528,203.40 = 115,489.20 : x
  2. Step 2: Convert to fraction form
    352,138.80/528,203.40 = 115,489.20/x
  3. Step 3: Cross multiply
    352,138.80x = 528,203.40 × 115,489.20
  4. Step 4: Simplify right side
    352,138.80x = 61,001,788,103.28
  5. Step 5: Solve for x
    x = 61,001,788,103.28/352,138.80
  6. Step 6: Final answer
    x = 173,232.23

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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.