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Finding the Fourth Proportional to 143,618.59, 198,178.61 and 83,208.79

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Solution

The fourth proportional to 143,618.59, 198,178.61 and 83,208.79 is: 114,819.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,618.59 : 198,178.61 = 83,208.79 : x
  2. Step 2: Convert to fraction form
    143,618.59/198,178.61 = 83,208.79/x
  3. Step 3: Cross multiply
    143,618.59x = 198,178.61 × 83,208.79
  4. Step 4: Simplify right side
    143,618.59x = 16,490,202,341.98
  5. Step 5: Solve for x
    x = 16,490,202,341.98/143,618.59
  6. Step 6: Final answer
    x = 114,819.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.