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Finding the Fourth Proportional to 129,374.58, 178,477.92 and 93,507.78

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Solution

The fourth proportional to 129,374.58, 178,477.92 and 93,507.78 is: 128,998.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,374.58 : 178,477.92 = 93,507.78 : x
  2. Step 2: Convert to fraction form
    129,374.58/178,477.92 = 93,507.78/x
  3. Step 3: Cross multiply
    129,374.58x = 178,477.92 × 93,507.78
  4. Step 4: Simplify right side
    129,374.58x = 16,689,074,078.22
  5. Step 5: Solve for x
    x = 16,689,074,078.22/129,374.58
  6. Step 6: Final answer
    x = 128,998.09

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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.