Home / 139,276.23-192,205.61-78,845.78

Finding the Fourth Proportional to 139,276.23, 192,205.61 and 78,845.78

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Solution

The fourth proportional to 139,276.23, 192,205.61 and 78,845.78 is: 108,809.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,276.23 : 192,205.61 = 78,845.78 : x
  2. Step 2: Convert to fraction form
    139,276.23/192,205.61 = 78,845.78/x
  3. Step 3: Cross multiply
    139,276.23x = 192,205.61 × 78,845.78
  4. Step 4: Simplify right side
    139,276.23x = 15,154,599,885.57
  5. Step 5: Solve for x
    x = 15,154,599,885.57/139,276.23
  6. Step 6: Final answer
    x = 108,809.66

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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.