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Finding the Fourth Proportional to 77,199, 115,798.50 and 18,831

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Solution

The fourth proportional to 77,199, 115,798.50 and 18,831 is: 28,246.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,199 : 115,798.50 = 18,831 : x
  2. Step 2: Convert to fraction form
    77,199/115,798.50 = 18,831/x
  3. Step 3: Cross multiply
    77,199x = 115,798.50 × 18,831
  4. Step 4: Simplify right side
    77,199x = 2,180,601,553.50
  5. Step 5: Solve for x
    x = 2,180,601,553.50/77,199
  6. Step 6: Final answer
    x = 28,246.50

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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.