Home / 142,784.80-197,032.20-79,121.24

Finding the Fourth Proportional to 142,784.80, 197,032.20 and 79,121.24

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Solution

The fourth proportional to 142,784.80, 197,032.20 and 79,121.24 is: 109,181.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,784.80 : 197,032.20 = 79,121.24 : x
  2. Step 2: Convert to fraction form
    142,784.80/197,032.20 = 79,121.24/x
  3. Step 3: Cross multiply
    142,784.80x = 197,032.20 × 79,121.24
  4. Step 4: Simplify right side
    142,784.80x = 15,589,431,983.93
  5. Step 5: Solve for x
    x = 15,589,431,983.93/142,784.80
  6. Step 6: Final answer
    x = 109,181.31

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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.