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Finding the Fourth Proportional to 339,789.78, 509,686.28 and 103,134.50

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Solution

The fourth proportional to 339,789.78, 509,686.28 and 103,134.50 is: 154,702.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,789.78 : 509,686.28 = 103,134.50 : x
  2. Step 2: Convert to fraction form
    339,789.78/509,686.28 = 103,134.50/x
  3. Step 3: Cross multiply
    339,789.78x = 509,686.28 × 103,134.50
  4. Step 4: Simplify right side
    339,789.78x = 52,566,239,644.66
  5. Step 5: Solve for x
    x = 52,566,239,644.66/339,789.78
  6. Step 6: Final answer
    x = 154,702.24

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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.