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Finding the Fourth Proportional to 89,732.90, 134,448.15 and 70,940.90

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Solution

The fourth proportional to 89,732.90, 134,448.15 and 70,940.90 is: 106,291.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,732.90 : 134,448.15 = 70,940.90 : x
  2. Step 2: Convert to fraction form
    89,732.90/134,448.15 = 70,940.90/x
  3. Step 3: Cross multiply
    89,732.90x = 134,448.15 × 70,940.90
  4. Step 4: Simplify right side
    89,732.90x = 9,537,872,764.34
  5. Step 5: Solve for x
    x = 9,537,872,764.34/89,732.90
  6. Step 6: Final answer
    x = 106,291.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.