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Finding the Fourth Proportional to 339,863.58, 509,856.66 and 140,072.76

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Solution

The fourth proportional to 339,863.58, 509,856.66 and 140,072.76 is: 210,134.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,863.58 : 509,856.66 = 140,072.76 : x
  2. Step 2: Convert to fraction form
    339,863.58/509,856.66 = 140,072.76/x
  3. Step 3: Cross multiply
    339,863.58x = 509,856.66 × 140,072.76
  4. Step 4: Simplify right side
    339,863.58x = 71,417,029,570.58
  5. Step 5: Solve for x
    x = 71,417,029,570.58/339,863.58
  6. Step 6: Final answer
    x = 210,134.40

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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.