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Finding the Fourth Proportional to 143,406.80, 215,110.20 and 137,963.60

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Solution

The fourth proportional to 143,406.80, 215,110.20 and 137,963.60 is: 206,945.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,406.80 : 215,110.20 = 137,963.60 : x
  2. Step 2: Convert to fraction form
    143,406.80/215,110.20 = 137,963.60/x
  3. Step 3: Cross multiply
    143,406.80x = 215,110.20 × 137,963.60
  4. Step 4: Simplify right side
    143,406.80x = 29,677,377,588.72
  5. Step 5: Solve for x
    x = 29,677,377,588.72/143,406.80
  6. Step 6: Final answer
    x = 206,945.40

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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.