Home / 81,922.40-122,786.40-42,459.20

Finding the Fourth Proportional to 81,922.40, 122,786.40 and 42,459.20

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Solution

The fourth proportional to 81,922.40, 122,786.40 and 42,459.20 is: 63,638.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,922.40 : 122,786.40 = 42,459.20 : x
  2. Step 2: Convert to fraction form
    81,922.40/122,786.40 = 42,459.20/x
  3. Step 3: Cross multiply
    81,922.40x = 122,786.40 × 42,459.20
  4. Step 4: Simplify right side
    81,922.40x = 5,213,412,314.88
  5. Step 5: Solve for x
    x = 5,213,412,314.88/81,922.40
  6. Step 6: Final answer
    x = 63,638.42

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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.