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Finding the Fourth Proportional to 89,226.40, 133,580.40 and 86,634.40

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Solution

The fourth proportional to 89,226.40, 133,580.40 and 86,634.40 is: 129,699.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,226.40 : 133,580.40 = 86,634.40 : x
  2. Step 2: Convert to fraction form
    89,226.40/133,580.40 = 86,634.40/x
  3. Step 3: Cross multiply
    89,226.40x = 133,580.40 × 86,634.40
  4. Step 4: Simplify right side
    89,226.40x = 11,572,657,805.76
  5. Step 5: Solve for x
    x = 11,572,657,805.76/89,226.40
  6. Step 6: Final answer
    x = 129,699.93

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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.