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Finding the Fourth Proportional to 86,606.70, 119,412.27 and 66,486.30

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Solution

The fourth proportional to 86,606.70, 119,412.27 and 66,486.30 is: 91,670.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,606.70 : 119,412.27 = 66,486.30 : x
  2. Step 2: Convert to fraction form
    86,606.70/119,412.27 = 66,486.30/x
  3. Step 3: Cross multiply
    86,606.70x = 119,412.27 × 66,486.30
  4. Step 4: Simplify right side
    86,606.70x = 7,939,280,006.90
  5. Step 5: Solve for x
    x = 7,939,280,006.90/86,606.70
  6. Step 6: Final answer
    x = 91,670.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.