Home / 142,401.42-196,514-81,145.85

Finding the Fourth Proportional to 142,401.42, 196,514 and 81,145.85

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Solution

The fourth proportional to 142,401.42, 196,514 and 81,145.85 is: 111,981.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,401.42 : 196,514 = 81,145.85 : x
  2. Step 2: Convert to fraction form
    142,401.42/196,514 = 81,145.85/x
  3. Step 3: Cross multiply
    142,401.42x = 196,514 × 81,145.85
  4. Step 4: Simplify right side
    142,401.42x = 15,946,295,566.90
  5. Step 5: Solve for x
    x = 15,946,295,566.90/142,401.42
  6. Step 6: Final answer
    x = 111,981.30

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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.