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Finding the Fourth Proportional to 139,880.97, 193,035.78 and 76,218.80

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Solution

The fourth proportional to 139,880.97, 193,035.78 and 76,218.80 is: 105,181.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,880.97 : 193,035.78 = 76,218.80 : x
  2. Step 2: Convert to fraction form
    139,880.97/193,035.78 = 76,218.80/x
  3. Step 3: Cross multiply
    139,880.97x = 193,035.78 × 76,218.80
  4. Step 4: Simplify right side
    139,880.97x = 14,712,954,543.49
  5. Step 5: Solve for x
    x = 14,712,954,543.49/139,880.97
  6. Step 6: Final answer
    x = 105,181.96

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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.