Home / 142,961.88-197,311.05-79,320.18

Finding the Fourth Proportional to 142,961.88, 197,311.05 and 79,320.18

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Solution

The fourth proportional to 142,961.88, 197,311.05 and 79,320.18 is: 109,474.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,961.88 : 197,311.05 = 79,320.18 : x
  2. Step 2: Convert to fraction form
    142,961.88/197,311.05 = 79,320.18/x
  3. Step 3: Cross multiply
    142,961.88x = 197,311.05 × 79,320.18
  4. Step 4: Simplify right side
    142,961.88x = 15,650,748,001.99
  5. Step 5: Solve for x
    x = 15,650,748,001.99/142,961.88
  6. Step 6: Final answer
    x = 109,474.97

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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.