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Finding the Fourth Proportional to 139,998.54, 193,198.86 and 76,337.40

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Solution

The fourth proportional to 139,998.54, 193,198.86 and 76,337.40 is: 105,346.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,998.54 : 193,198.86 = 76,337.40 : x
  2. Step 2: Convert to fraction form
    139,998.54/193,198.86 = 76,337.40/x
  3. Step 3: Cross multiply
    139,998.54x = 193,198.86 × 76,337.40
  4. Step 4: Simplify right side
    139,998.54x = 14,748,298,655.36
  5. Step 5: Solve for x
    x = 14,748,298,655.36/139,998.54
  6. Step 6: Final answer
    x = 105,346.09

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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.