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Finding the Fourth Proportional to 339,434.46, 509,151.68 and 86,715.50

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Solution

The fourth proportional to 339,434.46, 509,151.68 and 86,715.50 is: 130,073.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,434.46 : 509,151.68 = 86,715.50 : x
  2. Step 2: Convert to fraction form
    339,434.46/509,151.68 = 86,715.50/x
  3. Step 3: Cross multiply
    339,434.46x = 509,151.68 × 86,715.50
  4. Step 4: Simplify right side
    339,434.46x = 44,151,342,507.04
  5. Step 5: Solve for x
    x = 44,151,342,507.04/339,434.46
  6. Step 6: Final answer
    x = 130,073.25

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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.