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Finding the Fourth Proportional to 63,781.40, 95,675.70 and 19,409.60

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Solution

The fourth proportional to 63,781.40, 95,675.70 and 19,409.60 is: 29,115.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,781.40 : 95,675.70 = 19,409.60 : x
  2. Step 2: Convert to fraction form
    63,781.40/95,675.70 = 19,409.60/x
  3. Step 3: Cross multiply
    63,781.40x = 95,675.70 × 19,409.60
  4. Step 4: Simplify right side
    63,781.40x = 1,857,027,066.72
  5. Step 5: Solve for x
    x = 1,857,027,066.72/63,781.40
  6. Step 6: Final answer
    x = 29,115.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.