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Finding the Fourth Proportional to 123,772.60, 185,731.80 and 81,774.10

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Solution

The fourth proportional to 123,772.60, 185,731.80 and 81,774.10 is: 122,709.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,772.60 : 185,731.80 = 81,774.10 : x
  2. Step 2: Convert to fraction form
    123,772.60/185,731.80 = 81,774.10/x
  3. Step 3: Cross multiply
    123,772.60x = 185,731.80 × 81,774.10
  4. Step 4: Simplify right side
    123,772.60x = 15,188,050,786.38
  5. Step 5: Solve for x
    x = 15,188,050,786.38/123,772.60
  6. Step 6: Final answer
    x = 122,709.31

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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.