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Finding the Fourth Proportional to 144,959.90, 217,439.85 and 70,115.90

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Solution

The fourth proportional to 144,959.90, 217,439.85 and 70,115.90 is: 105,173.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,959.90 : 217,439.85 = 70,115.90 : x
  2. Step 2: Convert to fraction form
    144,959.90/217,439.85 = 70,115.90/x
  3. Step 3: Cross multiply
    144,959.90x = 217,439.85 × 70,115.90
  4. Step 4: Simplify right side
    144,959.90x = 15,245,990,778.62
  5. Step 5: Solve for x
    x = 15,245,990,778.62/144,959.90
  6. Step 6: Final answer
    x = 105,173.85

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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.