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Finding the Fourth Proportional to 143,940.80, 215,911.20 and 130,162.70

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Solution

The fourth proportional to 143,940.80, 215,911.20 and 130,162.70 is: 195,244.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,940.80 : 215,911.20 = 130,162.70 : x
  2. Step 2: Convert to fraction form
    143,940.80/215,911.20 = 130,162.70/x
  3. Step 3: Cross multiply
    143,940.80x = 215,911.20 × 130,162.70
  4. Step 4: Simplify right side
    143,940.80x = 28,103,584,752.24
  5. Step 5: Solve for x
    x = 28,103,584,752.24/143,940.80
  6. Step 6: Final answer
    x = 195,244.05

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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.