Home / 140,142.12-193,388.95-79,711.43

Finding the Fourth Proportional to 140,142.12, 193,388.95 and 79,711.43

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Solution

The fourth proportional to 140,142.12, 193,388.95 and 79,711.43 is: 109,997.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,142.12 : 193,388.95 = 79,711.43 : x
  2. Step 2: Convert to fraction form
    140,142.12/193,388.95 = 79,711.43/x
  3. Step 3: Cross multiply
    140,142.12x = 193,388.95 × 79,711.43
  4. Step 4: Simplify right side
    140,142.12x = 15,415,309,750.70
  5. Step 5: Solve for x
    x = 15,415,309,750.70/140,142.12
  6. Step 6: Final answer
    x = 109,997.69

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1.5x scale

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.