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Finding the Fourth Proportional to 352,398.74, 528,593.38 and 86,161.55

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Solution

The fourth proportional to 352,398.74, 528,593.38 and 86,161.55 is: 129,241.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,398.74 : 528,593.38 = 86,161.55 : x
  2. Step 2: Convert to fraction form
    352,398.74/528,593.38 = 86,161.55/x
  3. Step 3: Cross multiply
    352,398.74x = 528,593.38 × 86,161.55
  4. Step 4: Simplify right side
    352,398.74x = 45,544,422,082.17
  5. Step 5: Solve for x
    x = 45,544,422,082.17/352,398.74
  6. Step 6: Final answer
    x = 129,241.16

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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.