Home / 139,701.20-192,824.73-86,031.21

Finding the Fourth Proportional to 139,701.20, 192,824.73 and 86,031.21

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Solution

The fourth proportional to 139,701.20, 192,824.73 and 86,031.21 is: 118,745.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,701.20 : 192,824.73 = 86,031.21 : x
  2. Step 2: Convert to fraction form
    139,701.20/192,824.73 = 86,031.21/x
  3. Step 3: Cross multiply
    139,701.20x = 192,824.73 × 86,031.21
  4. Step 4: Simplify right side
    139,701.20x = 16,588,944,839.82
  5. Step 5: Solve for x
    x = 16,588,944,839.82/139,701.20
  6. Step 6: Final answer
    x = 118,745.91

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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.