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Finding the Fourth Proportional to 89,191.40, 133,787.10 and 86,599.40

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Solution

The fourth proportional to 89,191.40, 133,787.10 and 86,599.40 is: 129,899.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,191.40 : 133,787.10 = 86,599.40 : x
  2. Step 2: Convert to fraction form
    89,191.40/133,787.10 = 86,599.40/x
  3. Step 3: Cross multiply
    89,191.40x = 133,787.10 × 86,599.40
  4. Step 4: Simplify right side
    89,191.40x = 11,585,882,587.74
  5. Step 5: Solve for x
    x = 11,585,882,587.74/89,191.40
  6. Step 6: Final answer
    x = 129,899.10

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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.