Home / 139,364.43-192,319.68-81,217.45

Finding the Fourth Proportional to 139,364.43, 192,319.68 and 81,217.45

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Solution

The fourth proportional to 139,364.43, 192,319.68 and 81,217.45 is: 112,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,364.43 : 192,319.68 = 81,217.45 : x
  2. Step 2: Convert to fraction form
    139,364.43/192,319.68 = 81,217.45/x
  3. Step 3: Cross multiply
    139,364.43x = 192,319.68 × 81,217.45
  4. Step 4: Simplify right side
    139,364.43x = 15,619,714,373.69
  5. Step 5: Solve for x
    x = 15,619,714,373.69/139,364.43
  6. Step 6: Final answer
    x = 112,078.20

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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.