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Finding the Fourth Proportional to 339,386.67, 509,079.78 and 86,667.21

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Solution

The fourth proportional to 339,386.67, 509,079.78 and 86,667.21 is: 130,000.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,386.67 : 509,079.78 = 86,667.21 : x
  2. Step 2: Convert to fraction form
    339,386.67/509,079.78 = 86,667.21/x
  3. Step 3: Cross multiply
    339,386.67x = 509,079.78 × 86,667.21
  4. Step 4: Simplify right side
    339,386.67x = 44,120,524,200.01
  5. Step 5: Solve for x
    x = 44,120,524,200.01/339,386.67
  6. Step 6: Final answer
    x = 130,000.76

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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.