Home / 139,805.76-192,930.96-76,143.36

Finding the Fourth Proportional to 139,805.76, 192,930.96 and 76,143.36

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Solution

The fourth proportional to 139,805.76, 192,930.96 and 76,143.36 is: 105,077.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,805.76 : 192,930.96 = 76,143.36 : x
  2. Step 2: Convert to fraction form
    139,805.76/192,930.96 = 76,143.36/x
  3. Step 3: Cross multiply
    139,805.76x = 192,930.96 × 76,143.36
  4. Step 4: Simplify right side
    139,805.76x = 14,690,411,542.43
  5. Step 5: Solve for x
    x = 14,690,411,542.43/139,805.76
  6. Step 6: Final answer
    x = 105,077.30

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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.