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Finding the Fourth Proportional to 99,133.38, 136,803.78 and 53,811.54

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Solution

The fourth proportional to 99,133.38, 136,803.78 and 53,811.54 is: 74,259.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,133.38 : 136,803.78 = 53,811.54 : x
  2. Step 2: Convert to fraction form
    99,133.38/136,803.78 = 53,811.54/x
  3. Step 3: Cross multiply
    99,133.38x = 136,803.78 × 53,811.54
  4. Step 4: Simplify right side
    99,133.38x = 7,361,622,079.62
  5. Step 5: Solve for x
    x = 7,361,622,079.62/99,133.38
  6. Step 6: Final answer
    x = 74,259.77

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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.