Home / 81,905.98-122,888.54-28,605.81

Finding the Fourth Proportional to 81,905.98, 122,888.54 and 28,605.81

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Solution

The fourth proportional to 81,905.98, 122,888.54 and 28,605.81 is: 42,919.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,905.98 : 122,888.54 = 28,605.81 : x
  2. Step 2: Convert to fraction form
    81,905.98/122,888.54 = 28,605.81/x
  3. Step 3: Cross multiply
    81,905.98x = 122,888.54 × 28,605.81
  4. Step 4: Simplify right side
    81,905.98x = 3,515,326,226.42
  5. Step 5: Solve for x
    x = 3,515,326,226.42/81,905.98
  6. Step 6: Final answer
    x = 42,919.04

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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.