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Finding the Fourth Proportional to 98,683.09, 136,198.03 and 64,789.89

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Solution

The fourth proportional to 98,683.09, 136,198.03 and 64,789.89 is: 89,420.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,683.09 : 136,198.03 = 64,789.89 : x
  2. Step 2: Convert to fraction form
    98,683.09/136,198.03 = 64,789.89/x
  3. Step 3: Cross multiply
    98,683.09x = 136,198.03 × 64,789.89
  4. Step 4: Simplify right side
    98,683.09x = 8,824,255,381.92
  5. Step 5: Solve for x
    x = 8,824,255,381.92/98,683.09
  6. Step 6: Final answer
    x = 89,420.14

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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.