Home / 81,924.10-122,890.20-42,558.10

Finding the Fourth Proportional to 81,924.10, 122,890.20 and 42,558.10

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Solution

The fourth proportional to 81,924.10, 122,890.20 and 42,558.10 is: 63,839.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,924.10 : 122,890.20 = 42,558.10 : x
  2. Step 2: Convert to fraction form
    81,924.10/122,890.20 = 42,558.10/x
  3. Step 3: Cross multiply
    81,924.10x = 122,890.20 × 42,558.10
  4. Step 4: Simplify right side
    81,924.10x = 5,229,973,420.62
  5. Step 5: Solve for x
    x = 5,229,973,420.62/81,924.10
  6. Step 6: Final answer
    x = 63,839.25

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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.