Home / 142,942.90-197,247.18-79,279.42

Finding the Fourth Proportional to 142,942.90, 197,247.18 and 79,279.42

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Solution

The fourth proportional to 142,942.90, 197,247.18 and 79,279.42 is: 109,397.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,942.90 : 197,247.18 = 79,279.42 : x
  2. Step 2: Convert to fraction form
    142,942.90/197,247.18 = 79,279.42/x
  3. Step 3: Cross multiply
    142,942.90x = 197,247.18 × 79,279.42
  4. Step 4: Simplify right side
    142,942.90x = 15,637,642,027.04
  5. Step 5: Solve for x
    x = 15,637,642,027.04/142,942.90
  6. Step 6: Final answer
    x = 109,397.82

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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.