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Finding the Fourth Proportional to 86,683.66, 119,543.38 and 66,541.39

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Solution

The fourth proportional to 86,683.66, 119,543.38 and 66,541.39 is: 91,765.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,683.66 : 119,543.38 = 66,541.39 : x
  2. Step 2: Convert to fraction form
    86,683.66/119,543.38 = 66,541.39/x
  3. Step 3: Cross multiply
    86,683.66x = 119,543.38 × 66,541.39
  4. Step 4: Simplify right side
    86,683.66x = 7,954,582,670.50
  5. Step 5: Solve for x
    x = 7,954,582,670.50/86,683.66
  6. Step 6: Final answer
    x = 91,765.65

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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.