Home / 86,219.40-129,426.30-51,178.80

Finding the Fourth Proportional to 86,219.40, 129,426.30 and 51,178.80

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Solution

The fourth proportional to 86,219.40, 129,426.30 and 51,178.80 is: 76,825.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,219.40 : 129,426.30 = 51,178.80 : x
  2. Step 2: Convert to fraction form
    86,219.40/129,426.30 = 51,178.80/x
  3. Step 3: Cross multiply
    86,219.40x = 129,426.30 × 51,178.80
  4. Step 4: Simplify right side
    86,219.40x = 6,623,882,722.44
  5. Step 5: Solve for x
    x = 6,623,882,722.44/86,219.40
  6. Step 6: Final answer
    x = 76,825.90

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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.