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Finding the Fourth Proportional to 245,951.20, 368,912.22 and 86,015.98

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Solution

The fourth proportional to 245,951.20, 368,912.22 and 86,015.98 is: 129,018.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,951.20 : 368,912.22 = 86,015.98 : x
  2. Step 2: Convert to fraction form
    245,951.20/368,912.22 = 86,015.98/x
  3. Step 3: Cross multiply
    245,951.20x = 368,912.22 × 86,015.98
  4. Step 4: Simplify right side
    245,951.20x = 31,732,346,137.28
  5. Step 5: Solve for x
    x = 31,732,346,137.28/245,951.20
  6. Step 6: Final answer
    x = 129,018.87

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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.