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Finding the Fourth Proportional to 258,069.80, 387,296.70 and 133,346.60

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Solution

The fourth proportional to 258,069.80, 387,296.70 and 133,346.60 is: 200,119.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,069.80 : 387,296.70 = 133,346.60 : x
  2. Step 2: Convert to fraction form
    258,069.80/387,296.70 = 133,346.60/x
  3. Step 3: Cross multiply
    258,069.80x = 387,296.70 × 133,346.60
  4. Step 4: Simplify right side
    258,069.80x = 51,644,698,136.22
  5. Step 5: Solve for x
    x = 51,644,698,136.22/258,069.80
  6. Step 6: Final answer
    x = 200,119.11

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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.