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Finding the Fourth Proportional to 143,940.70, 215,911.05 and 126,444.70

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Solution

The fourth proportional to 143,940.70, 215,911.05 and 126,444.70 is: 189,667.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,940.70 : 215,911.05 = 126,444.70 : x
  2. Step 2: Convert to fraction form
    143,940.70/215,911.05 = 126,444.70/x
  3. Step 3: Cross multiply
    143,940.70x = 215,911.05 × 126,444.70
  4. Step 4: Simplify right side
    143,940.70x = 27,300,807,943.94
  5. Step 5: Solve for x
    x = 27,300,807,943.94/143,940.70
  6. Step 6: Final answer
    x = 189,667.05

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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.