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Finding the Fourth Proportional to 131,978.40, 197,578.80 and 124,288.80

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Solution

The fourth proportional to 131,978.40, 197,578.80 and 124,288.80 is: 186,067.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,978.40 : 197,578.80 = 124,288.80 : x
  2. Step 2: Convert to fraction form
    131,978.40/197,578.80 = 124,288.80/x
  3. Step 3: Cross multiply
    131,978.40x = 197,578.80 × 124,288.80
  4. Step 4: Simplify right side
    131,978.40x = 24,556,831,957.44
  5. Step 5: Solve for x
    x = 24,556,831,957.44/131,978.40
  6. Step 6: Final answer
    x = 186,067.05

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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.