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Finding the Fourth Proportional to 143,385.85, 197,871.82 and 79,719.85

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Solution

The fourth proportional to 143,385.85, 197,871.82 and 79,719.85 is: 110,013.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,385.85 : 197,871.82 = 79,719.85 : x
  2. Step 2: Convert to fraction form
    143,385.85/197,871.82 = 79,719.85/x
  3. Step 3: Cross multiply
    143,385.85x = 197,871.82 × 79,719.85
  4. Step 4: Simplify right side
    143,385.85x = 15,774,311,809.63
  5. Step 5: Solve for x
    x = 15,774,311,809.63/143,385.85
  6. Step 6: Final answer
    x = 110,013.03

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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.