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Finding the Fourth Proportional to 338,717.54, 508,076.54 and 86,016.98

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Solution

The fourth proportional to 338,717.54, 508,076.54 and 86,016.98 is: 129,025.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,717.54 : 508,076.54 = 86,016.98 : x
  2. Step 2: Convert to fraction form
    338,717.54/508,076.54 = 86,016.98/x
  3. Step 3: Cross multiply
    338,717.54x = 508,076.54 × 86,016.98
  4. Step 4: Simplify right side
    338,717.54x = 43,703,209,579.65
  5. Step 5: Solve for x
    x = 43,703,209,579.65/338,717.54
  6. Step 6: Final answer
    x = 129,025.53

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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.