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Finding the Fourth Proportional to 339,382.47, 509,073.26 and 86,662.83

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Solution

The fourth proportional to 339,382.47, 509,073.26 and 86,662.83 is: 129,994.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,382.47 : 509,073.26 = 86,662.83 : x
  2. Step 2: Convert to fraction form
    339,382.47/509,073.26 = 86,662.83/x
  3. Step 3: Cross multiply
    339,382.47x = 509,073.26 × 86,662.83
  4. Step 4: Simplify right side
    339,382.47x = 44,117,730,879.97
  5. Step 5: Solve for x
    x = 44,117,730,879.97/339,382.47
  6. Step 6: Final answer
    x = 129,994.14

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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.