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Finding the Fourth Proportional to 89,113.80, 133,670.70 and 65,843.40

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Solution

The fourth proportional to 89,113.80, 133,670.70 and 65,843.40 is: 98,765.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,113.80 : 133,670.70 = 65,843.40 : x
  2. Step 2: Convert to fraction form
    89,113.80/133,670.70 = 65,843.40/x
  3. Step 3: Cross multiply
    89,113.80x = 133,670.70 × 65,843.40
  4. Step 4: Simplify right side
    89,113.80x = 8,801,333,368.38
  5. Step 5: Solve for x
    x = 8,801,333,368.38/89,113.80
  6. Step 6: Final answer
    x = 98,765.10

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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.