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Finding the Fourth Proportional to 64,611.90, 96,917.81 and 20,242.13

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Solution

The fourth proportional to 64,611.90, 96,917.81 and 20,242.13 is: 30,363.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,611.90 : 96,917.81 = 20,242.13 : x
  2. Step 2: Convert to fraction form
    64,611.90/96,917.81 = 20,242.13/x
  3. Step 3: Cross multiply
    64,611.90x = 96,917.81 × 20,242.13
  4. Step 4: Simplify right side
    64,611.90x = 1,961,822,323.54
  5. Step 5: Solve for x
    x = 1,961,822,323.54/64,611.90
  6. Step 6: Final answer
    x = 30,363.17

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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.