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Finding the Fourth Proportional to 61,683.76, 85,120.32 and 36,186.60

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Solution

The fourth proportional to 61,683.76, 85,120.32 and 36,186.60 is: 49,935.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,683.76 : 85,120.32 = 36,186.60 : x
  2. Step 2: Convert to fraction form
    61,683.76/85,120.32 = 36,186.60/x
  3. Step 3: Cross multiply
    61,683.76x = 85,120.32 × 36,186.60
  4. Step 4: Simplify right side
    61,683.76x = 3,080,214,971.71
  5. Step 5: Solve for x
    x = 3,080,214,971.71/61,683.76
  6. Step 6: Final answer
    x = 49,935.59

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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.