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Finding the Fourth Proportional to 89,706.39, 133,755.19 and 86,464.90

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Solution

The fourth proportional to 89,706.39, 133,755.19 and 86,464.90 is: 128,922.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,706.39 : 133,755.19 = 86,464.90 : x
  2. Step 2: Convert to fraction form
    89,706.39/133,755.19 = 86,464.90/x
  3. Step 3: Cross multiply
    89,706.39x = 133,755.19 × 86,464.90
  4. Step 4: Simplify right side
    89,706.39x = 11,565,129,127.83
  5. Step 5: Solve for x
    x = 11,565,129,127.83/89,706.39
  6. Step 6: Final answer
    x = 128,922.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.