Home / 81,409.73-122,128.45-28,087.25

Finding the Fourth Proportional to 81,409.73, 122,128.45 and 28,087.25

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Solution

The fourth proportional to 81,409.73, 122,128.45 and 28,087.25 is: 42,135.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,409.73 : 122,128.45 = 28,087.25 : x
  2. Step 2: Convert to fraction form
    81,409.73/122,128.45 = 28,087.25/x
  3. Step 3: Cross multiply
    81,409.73x = 122,128.45 × 28,087.25
  4. Step 4: Simplify right side
    81,409.73x = 3,430,252,307.26
  5. Step 5: Solve for x
    x = 3,430,252,307.26/81,409.73
  6. Step 6: Final answer
    x = 42,135.66

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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.