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Finding the Fourth Proportional to 352,136.40, 528,010.20 and 115,357.20

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Solution

The fourth proportional to 352,136.40, 528,010.20 and 115,357.20 is: 172,972.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,136.40 : 528,010.20 = 115,357.20 : x
  2. Step 2: Convert to fraction form
    352,136.40/528,010.20 = 115,357.20/x
  3. Step 3: Cross multiply
    352,136.40x = 528,010.20 × 115,357.20
  4. Step 4: Simplify right side
    352,136.40x = 60,909,778,243.44
  5. Step 5: Solve for x
    x = 60,909,778,243.44/352,136.40
  6. Step 6: Final answer
    x = 172,972.12

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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.