Home / 142,941.90-197,245.80-79,278.42

Finding the Fourth Proportional to 142,941.90, 197,245.80 and 79,278.42

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Solution

The fourth proportional to 142,941.90, 197,245.80 and 79,278.42 is: 109,396.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,941.90 : 197,245.80 = 79,278.42 : x
  2. Step 2: Convert to fraction form
    142,941.90/197,245.80 = 79,278.42/x
  3. Step 3: Cross multiply
    142,941.90x = 197,245.80 × 79,278.42
  4. Step 4: Simplify right side
    142,941.90x = 15,637,335,375.64
  5. Step 5: Solve for x
    x = 15,637,335,375.64/142,941.90
  6. Step 6: Final answer
    x = 109,396.44

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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.