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Finding the Fourth Proportional to 77,069.52, 115,591.68 and 27,137.88

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Solution

The fourth proportional to 77,069.52, 115,591.68 and 27,137.88 is: 40,702.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,069.52 : 115,591.68 = 27,137.88 : x
  2. Step 2: Convert to fraction form
    77,069.52/115,591.68 = 27,137.88/x
  3. Step 3: Cross multiply
    77,069.52x = 115,591.68 × 27,137.88
  4. Step 4: Simplify right side
    77,069.52x = 3,136,913,140.84
  5. Step 5: Solve for x
    x = 3,136,913,140.84/77,069.52
  6. Step 6: Final answer
    x = 40,702.38

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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.