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Finding the Fourth Proportional to 117,138.78, 175,706.64 and 28,393.05

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Solution

The fourth proportional to 117,138.78, 175,706.64 and 28,393.05 is: 42,589.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,138.78 : 175,706.64 = 28,393.05 : x
  2. Step 2: Convert to fraction form
    117,138.78/175,706.64 = 28,393.05/x
  3. Step 3: Cross multiply
    117,138.78x = 175,706.64 × 28,393.05
  4. Step 4: Simplify right side
    117,138.78x = 4,988,847,414.85
  5. Step 5: Solve for x
    x = 4,988,847,414.85/117,138.78
  6. Step 6: Final answer
    x = 42,589.20

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1.5x scale

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.