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Finding the Fourth Proportional to 65,999.39, 91,072.40 and 40,506.81

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Solution

The fourth proportional to 65,999.39, 91,072.40 and 40,506.81 is: 55,895.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,999.39 : 91,072.40 = 40,506.81 : x
  2. Step 2: Convert to fraction form
    65,999.39/91,072.40 = 40,506.81/x
  3. Step 3: Cross multiply
    65,999.39x = 91,072.40 × 40,506.81
  4. Step 4: Simplify right side
    65,999.39x = 3,689,052,200.51
  5. Step 5: Solve for x
    x = 3,689,052,200.51/65,999.39
  6. Step 6: Final answer
    x = 55,895.25

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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.