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Finding the Fourth Proportional to 352,321.72, 528,475.62 and 86,074.36

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Solution

The fourth proportional to 352,321.72, 528,475.62 and 86,074.36 is: 129,109.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,321.72 : 528,475.62 = 86,074.36 : x
  2. Step 2: Convert to fraction form
    352,321.72/528,475.62 = 86,074.36/x
  3. Step 3: Cross multiply
    352,321.72x = 528,475.62 × 86,074.36
  4. Step 4: Simplify right side
    352,321.72x = 45,488,200,767.10
  5. Step 5: Solve for x
    x = 45,488,200,767.10/352,321.72
  6. Step 6: Final answer
    x = 129,109.84

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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.