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Finding the Fourth Proportional to 339,393.42, 509,089.91 and 86,673.96

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Solution

The fourth proportional to 339,393.42, 509,089.91 and 86,673.96 is: 130,010.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,393.42 : 509,089.91 = 86,673.96 : x
  2. Step 2: Convert to fraction form
    339,393.42/509,089.91 = 86,673.96/x
  3. Step 3: Cross multiply
    339,393.42x = 509,089.91 × 86,673.96
  4. Step 4: Simplify right side
    339,393.42x = 44,124,838,062.37
  5. Step 5: Solve for x
    x = 44,124,838,062.37/339,393.42
  6. Step 6: Final answer
    x = 130,010.88

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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.