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Finding the Fourth Proportional to 77,367.50, 116,103.12 and 28,119.50

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Solution

The fourth proportional to 77,367.50, 116,103.12 and 28,119.50 is: 42,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,367.50 : 116,103.12 = 28,119.50 : x
  2. Step 2: Convert to fraction form
    77,367.50/116,103.12 = 28,119.50/x
  3. Step 3: Cross multiply
    77,367.50x = 116,103.12 × 28,119.50
  4. Step 4: Simplify right side
    77,367.50x = 3,264,761,682.84
  5. Step 5: Solve for x
    x = 3,264,761,682.84/77,367.50
  6. Step 6: Final answer
    x = 42,198.10

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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.