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Finding the Fourth Proportional to 139,937.79, 193,112.19 and 76,275.84

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Solution

The fourth proportional to 139,937.79, 193,112.19 and 76,275.84 is: 105,259.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,937.79 : 193,112.19 = 76,275.84 : x
  2. Step 2: Convert to fraction form
    139,937.79/193,112.19 = 76,275.84/x
  3. Step 3: Cross multiply
    139,937.79x = 193,112.19 × 76,275.84
  4. Step 4: Simplify right side
    139,937.79x = 14,729,794,506.49
  5. Step 5: Solve for x
    x = 14,729,794,506.49/139,937.79
  6. Step 6: Final answer
    x = 105,259.59

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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.