Home / 142,697.02-196,921.92-78,166.54

Finding the Fourth Proportional to 142,697.02, 196,921.92 and 78,166.54

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Solution

The fourth proportional to 142,697.02, 196,921.92 and 78,166.54 is: 107,869.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,697.02 : 196,921.92 = 78,166.54 : x
  2. Step 2: Convert to fraction form
    142,697.02/196,921.92 = 78,166.54/x
  3. Step 3: Cross multiply
    142,697.02x = 196,921.92 × 78,166.54
  4. Step 4: Simplify right side
    142,697.02x = 15,392,705,136.56
  5. Step 5: Solve for x
    x = 15,392,705,136.56/142,697.02
  6. Step 6: Final answer
    x = 107,869.84

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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.