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Finding the Fourth Proportional to 338,736.21, 508,104.53 and 86,035.65

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Solution

The fourth proportional to 338,736.21, 508,104.53 and 86,035.65 is: 129,053.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,736.21 : 508,104.53 = 86,035.65 : x
  2. Step 2: Convert to fraction form
    338,736.21/508,104.53 = 86,035.65/x
  3. Step 3: Cross multiply
    338,736.21x = 508,104.53 × 86,035.65
  4. Step 4: Simplify right side
    338,736.21x = 43,715,103,076.32
  5. Step 5: Solve for x
    x = 43,715,103,076.32/338,736.21
  6. Step 6: Final answer
    x = 129,053.53

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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.