Home / 86,819.40-130,229.10-53,431.20

Finding the Fourth Proportional to 86,819.40, 130,229.10 and 53,431.20

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Solution

The fourth proportional to 86,819.40, 130,229.10 and 53,431.20 is: 80,146.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,819.40 : 130,229.10 = 53,431.20 : x
  2. Step 2: Convert to fraction form
    86,819.40/130,229.10 = 53,431.20/x
  3. Step 3: Cross multiply
    86,819.40x = 130,229.10 × 53,431.20
  4. Step 4: Simplify right side
    86,819.40x = 6,958,297,087.92
  5. Step 5: Solve for x
    x = 6,958,297,087.92/86,819.40
  6. Step 6: Final answer
    x = 80,146.80

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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.