Home / 142,921.20-197,243.37-79,279.50

Finding the Fourth Proportional to 142,921.20, 197,243.37 and 79,279.50

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Solution

The fourth proportional to 142,921.20, 197,243.37 and 79,279.50 is: 109,412.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,921.20 : 197,243.37 = 79,279.50 : x
  2. Step 2: Convert to fraction form
    142,921.20/197,243.37 = 79,279.50/x
  3. Step 3: Cross multiply
    142,921.20x = 197,243.37 × 79,279.50
  4. Step 4: Simplify right side
    142,921.20x = 15,637,355,751.92
  5. Step 5: Solve for x
    x = 15,637,355,751.92/142,921.20
  6. Step 6: Final answer
    x = 109,412.43

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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.