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Finding the Fourth Proportional to 187,878.45, 281,325.60 and 137,686.80

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Solution

The fourth proportional to 187,878.45, 281,325.60 and 137,686.80 is: 206,169.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,878.45 : 281,325.60 = 137,686.80 : x
  2. Step 2: Convert to fraction form
    187,878.45/281,325.60 = 137,686.80/x
  3. Step 3: Cross multiply
    187,878.45x = 281,325.60 × 137,686.80
  4. Step 4: Simplify right side
    187,878.45x = 38,734,821,622.08
  5. Step 5: Solve for x
    x = 38,734,821,622.08/187,878.45
  6. Step 6: Final answer
    x = 206,169.58

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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.