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Finding the Fourth Proportional to 339,371.32, 509,056.44 and 86,651.68

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Solution

The fourth proportional to 339,371.32, 509,056.44 and 86,651.68 is: 129,977.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,371.32 : 509,056.44 = 86,651.68 : x
  2. Step 2: Convert to fraction form
    339,371.32/509,056.44 = 86,651.68/x
  3. Step 3: Cross multiply
    339,371.32x = 509,056.44 × 86,651.68
  4. Step 4: Simplify right side
    339,371.32x = 44,110,595,740.82
  5. Step 5: Solve for x
    x = 44,110,595,740.82/339,371.32
  6. Step 6: Final answer
    x = 129,977.38

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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.