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Finding the Fourth Proportional to 339,685.13, 509,516.01 and 86,967.87

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Solution

The fourth proportional to 339,685.13, 509,516.01 and 86,967.87 is: 130,448.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,685.13 : 509,516.01 = 86,967.87 : x
  2. Step 2: Convert to fraction form
    339,685.13/509,516.01 = 86,967.87/x
  3. Step 3: Cross multiply
    339,685.13x = 509,516.01 × 86,967.87
  4. Step 4: Simplify right side
    339,685.13x = 44,311,522,120.60
  5. Step 5: Solve for x
    x = 44,311,522,120.60/339,685.13
  6. Step 6: Final answer
    x = 130,448.82

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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.