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Finding the Fourth Proportional to 99,211.68, 136,832.90 and 65,255.00

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Solution

The fourth proportional to 99,211.68, 136,832.90 and 65,255.00 is: 89,999.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,211.68 : 136,832.90 = 65,255.00 : x
  2. Step 2: Convert to fraction form
    99,211.68/136,832.90 = 65,255.00/x
  3. Step 3: Cross multiply
    99,211.68x = 136,832.90 × 65,255.00
  4. Step 4: Simplify right side
    99,211.68x = 8,929,029,879.06
  5. Step 5: Solve for x
    x = 8,929,029,879.06/99,211.68
  6. Step 6: Final answer
    x = 89,999.79

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1.5x scale

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.