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Finding the Fourth Proportional to 139,900.44, 193,053.36 and 78,656.07

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Solution

The fourth proportional to 139,900.44, 193,053.36 and 78,656.07 is: 108,540.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,900.44 : 193,053.36 = 78,656.07 : x
  2. Step 2: Convert to fraction form
    139,900.44/193,053.36 = 78,656.07/x
  3. Step 3: Cross multiply
    139,900.44x = 193,053.36 × 78,656.07
  4. Step 4: Simplify right side
    139,900.44x = 15,184,818,597.90
  5. Step 5: Solve for x
    x = 15,184,818,597.90/139,900.44
  6. Step 6: Final answer
    x = 108,540.18

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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.