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Finding the Fourth Proportional to 86,014.70, 129,022.05 and 66,331.70

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Solution

The fourth proportional to 86,014.70, 129,022.05 and 66,331.70 is: 99,497.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,014.70 : 129,022.05 = 66,331.70 : x
  2. Step 2: Convert to fraction form
    86,014.70/129,022.05 = 66,331.70/x
  3. Step 3: Cross multiply
    86,014.70x = 129,022.05 × 66,331.70
  4. Step 4: Simplify right side
    86,014.70x = 8,558,251,913.99
  5. Step 5: Solve for x
    x = 8,558,251,913.99/86,014.70
  6. Step 6: Final answer
    x = 99,497.55

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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.