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Finding the Fourth Proportional to 339,397.42, 509,095.90 and 86,677.96

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Solution

The fourth proportional to 339,397.42, 509,095.90 and 86,677.96 is: 130,016.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,397.42 : 509,095.90 = 86,677.96 : x
  2. Step 2: Convert to fraction form
    339,397.42/509,095.90 = 86,677.96/x
  3. Step 3: Cross multiply
    339,397.42x = 509,095.90 × 86,677.96
  4. Step 4: Simplify right side
    339,397.42x = 44,127,394,056.36
  5. Step 5: Solve for x
    x = 44,127,394,056.36/339,397.42
  6. Step 6: Final answer
    x = 130,016.88

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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.