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Finding the Fourth Proportional to 89,189.40, 133,784.10 and 86,597.40

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Solution

The fourth proportional to 89,189.40, 133,784.10 and 86,597.40 is: 129,896.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,189.40 : 133,784.10 = 86,597.40 : x
  2. Step 2: Convert to fraction form
    89,189.40/133,784.10 = 86,597.40/x
  3. Step 3: Cross multiply
    89,189.40x = 133,784.10 × 86,597.40
  4. Step 4: Simplify right side
    89,189.40x = 11,585,355,221.34
  5. Step 5: Solve for x
    x = 11,585,355,221.34/89,189.40
  6. Step 6: Final answer
    x = 129,896.10

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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.