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Finding the Fourth Proportional to 338,736.96, 508,105.65 and 86,036.40

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Solution

The fourth proportional to 338,736.96, 508,105.65 and 86,036.40 is: 129,054.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,736.96 : 508,105.65 = 86,036.40 : x
  2. Step 2: Convert to fraction form
    338,736.96/508,105.65 = 86,036.40/x
  3. Step 3: Cross multiply
    338,736.96x = 508,105.65 × 86,036.40
  4. Step 4: Simplify right side
    338,736.96x = 43,715,580,945.66
  5. Step 5: Solve for x
    x = 43,715,580,945.66/338,736.96
  6. Step 6: Final answer
    x = 129,054.65

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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.