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Finding the Fourth Proportional to 86,529.80, 129,794.70 and 66,846.80

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Solution

The fourth proportional to 86,529.80, 129,794.70 and 66,846.80 is: 100,270.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,529.80 : 129,794.70 = 66,846.80 : x
  2. Step 2: Convert to fraction form
    86,529.80/129,794.70 = 66,846.80/x
  3. Step 3: Cross multiply
    86,529.80x = 129,794.70 × 66,846.80
  4. Step 4: Simplify right side
    86,529.80x = 8,676,360,351.96
  5. Step 5: Solve for x
    x = 8,676,360,351.96/86,529.80
  6. Step 6: Final answer
    x = 100,270.20

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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.