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Finding the Fourth Proportional to 66,211.51, 91,373.64 and 35,998.87

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Solution

The fourth proportional to 66,211.51, 91,373.64 and 35,998.87 is: 49,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,211.51 : 91,373.64 = 35,998.87 : x
  2. Step 2: Convert to fraction form
    66,211.51/91,373.64 = 35,998.87/x
  3. Step 3: Cross multiply
    66,211.51x = 91,373.64 × 35,998.87
  4. Step 4: Simplify right side
    66,211.51x = 3,289,347,787.79
  5. Step 5: Solve for x
    x = 3,289,347,787.79/66,211.51
  6. Step 6: Final answer
    x = 49,679.40

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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.