Home / 81,018.75-121,522.01-28,431.75

Finding the Fourth Proportional to 81,018.75, 121,522.01 and 28,431.75

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Solution

The fourth proportional to 81,018.75, 121,522.01 and 28,431.75 is: 42,645.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,018.75 : 121,522.01 = 28,431.75 : x
  2. Step 2: Convert to fraction form
    81,018.75/121,522.01 = 28,431.75/x
  3. Step 3: Cross multiply
    81,018.75x = 121,522.01 × 28,431.75
  4. Step 4: Simplify right side
    81,018.75x = 3,455,083,265.66
  5. Step 5: Solve for x
    x = 3,455,083,265.66/81,018.75
  6. Step 6: Final answer
    x = 42,645.48

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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.