Home / 81,479.40-122,146.20-53,412.90

Finding the Fourth Proportional to 81,479.40, 122,146.20 and 53,412.90

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Solution

The fourth proportional to 81,479.40, 122,146.20 and 53,412.90 is: 80,071.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,479.40 : 122,146.20 = 53,412.90 : x
  2. Step 2: Convert to fraction form
    81,479.40/122,146.20 = 53,412.90/x
  3. Step 3: Cross multiply
    81,479.40x = 122,146.20 × 53,412.90
  4. Step 4: Simplify right side
    81,479.40x = 6,524,182,765.98
  5. Step 5: Solve for x
    x = 6,524,182,765.98/81,479.40
  6. Step 6: Final answer
    x = 80,071.56

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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.