Home / 142,836.40-197,100.30-79,172.83

Finding the Fourth Proportional to 142,836.40, 197,100.30 and 79,172.83

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Solution

The fourth proportional to 142,836.40, 197,100.30 and 79,172.83 is: 109,250.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,836.40 : 197,100.30 = 79,172.83 : x
  2. Step 2: Convert to fraction form
    142,836.40/197,100.30 = 79,172.83/x
  3. Step 3: Cross multiply
    142,836.40x = 197,100.30 × 79,172.83
  4. Step 4: Simplify right side
    142,836.40x = 15,604,988,544.85
  5. Step 5: Solve for x
    x = 15,604,988,544.85/142,836.40
  6. Step 6: Final answer
    x = 109,250.78

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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.