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Finding the Fourth Proportional to 78,932.74, 108,925.81 and 43,121.83

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Solution

The fourth proportional to 78,932.74, 108,925.81 and 43,121.83 is: 59,507.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,932.74 : 108,925.81 = 43,121.83 : x
  2. Step 2: Convert to fraction form
    78,932.74/108,925.81 = 43,121.83/x
  3. Step 3: Cross multiply
    78,932.74x = 108,925.81 × 43,121.83
  4. Step 4: Simplify right side
    78,932.74x = 4,697,080,261.43
  5. Step 5: Solve for x
    x = 4,697,080,261.43/78,932.74
  6. Step 6: Final answer
    x = 59,507.38

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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.