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Finding the Fourth Proportional to 339,686.13, 509,517.51 and 86,968.87

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Solution

The fourth proportional to 339,686.13, 509,517.51 and 86,968.87 is: 130,450.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,686.13 : 509,517.51 = 86,968.87 : x
  2. Step 2: Convert to fraction form
    339,686.13/509,517.51 = 86,968.87/x
  3. Step 3: Cross multiply
    339,686.13x = 509,517.51 × 86,968.87
  4. Step 4: Simplify right side
    339,686.13x = 44,312,162,089.91
  5. Step 5: Solve for x
    x = 44,312,162,089.91/339,686.13
  6. Step 6: Final answer
    x = 130,450.31

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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.