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Finding the Fourth Proportional to 339,674.80, 509,514.36 and 99,787.72

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Solution

The fourth proportional to 339,674.80, 509,514.36 and 99,787.72 is: 149,682.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,674.80 : 509,514.36 = 99,787.72 : x
  2. Step 2: Convert to fraction form
    339,674.80/509,514.36 = 99,787.72/x
  3. Step 3: Cross multiply
    339,674.80x = 509,514.36 × 99,787.72
  4. Step 4: Simplify right side
    339,674.80x = 50,843,276,291.66
  5. Step 5: Solve for x
    x = 50,843,276,291.66/339,674.80
  6. Step 6: Final answer
    x = 149,682.22

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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.