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Finding the Fourth Proportional to 61,808.94, 85,286.05 and 38,835.18

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Solution

The fourth proportional to 61,808.94, 85,286.05 and 38,835.18 is: 53,586.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,808.94 : 85,286.05 = 38,835.18 : x
  2. Step 2: Convert to fraction form
    61,808.94/85,286.05 = 38,835.18/x
  3. Step 3: Cross multiply
    61,808.94x = 85,286.05 × 38,835.18
  4. Step 4: Simplify right side
    61,808.94x = 3,312,099,006.15
  5. Step 5: Solve for x
    x = 3,312,099,006.15/61,808.94
  6. Step 6: Final answer
    x = 53,586.08

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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.