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Finding the Fourth Proportional to 93,765.75, 129,385.31 and 74,694.08

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Solution

The fourth proportional to 93,765.75, 129,385.31 and 74,694.08 is: 103,068.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,765.75 : 129,385.31 = 74,694.08 : x
  2. Step 2: Convert to fraction form
    93,765.75/129,385.31 = 74,694.08/x
  3. Step 3: Cross multiply
    93,765.75x = 129,385.31 × 74,694.08
  4. Step 4: Simplify right side
    93,765.75x = 9,664,315,675.57
  5. Step 5: Solve for x
    x = 9,664,315,675.57/93,765.75
  6. Step 6: Final answer
    x = 103,068.72

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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.