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Finding the Fourth Proportional to 143,377.40, 215,066.10 and 108,385.40

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Solution

The fourth proportional to 143,377.40, 215,066.10 and 108,385.40 is: 162,578.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,377.40 : 215,066.10 = 108,385.40 : x
  2. Step 2: Convert to fraction form
    143,377.40/215,066.10 = 108,385.40/x
  3. Step 3: Cross multiply
    143,377.40x = 215,066.10 × 108,385.40
  4. Step 4: Simplify right side
    143,377.40x = 23,310,025,274.94
  5. Step 5: Solve for x
    x = 23,310,025,274.94/143,377.40
  6. Step 6: Final answer
    x = 162,578.10

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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.