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Finding the Fourth Proportional to 115,354.80, 159,189.60 and 65,053.68

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Solution

The fourth proportional to 115,354.80, 159,189.60 and 65,053.68 is: 89,774.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,354.80 : 159,189.60 = 65,053.68 : x
  2. Step 2: Convert to fraction form
    115,354.80/159,189.60 = 65,053.68/x
  3. Step 3: Cross multiply
    115,354.80x = 159,189.60 × 65,053.68
  4. Step 4: Simplify right side
    115,354.80x = 10,355,869,297.73
  5. Step 5: Solve for x
    x = 10,355,869,297.73/115,354.80
  6. Step 6: Final answer
    x = 89,774.06

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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.