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Finding the Fourth Proportional to 99,206.72, 136,826.05 and 65,250.06

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Solution

The fourth proportional to 99,206.72, 136,826.05 and 65,250.06 is: 89,992.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,206.72 : 136,826.05 = 65,250.06 : x
  2. Step 2: Convert to fraction form
    99,206.72/136,826.05 = 65,250.06/x
  3. Step 3: Cross multiply
    99,206.72x = 136,826.05 × 65,250.06
  4. Step 4: Simplify right side
    99,206.72x = 8,927,907,645.81
  5. Step 5: Solve for x
    x = 8,927,907,645.81/99,206.72
  6. Step 6: Final answer
    x = 89,992.98

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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.