Home / 81,028.78-121,543.16-21,864.45

Finding the Fourth Proportional to 81,028.78, 121,543.16 and 21,864.45

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Solution

The fourth proportional to 81,028.78, 121,543.16 and 21,864.45 is: 32,796.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,028.78 : 121,543.16 = 21,864.45 : x
  2. Step 2: Convert to fraction form
    81,028.78/121,543.16 = 21,864.45/x
  3. Step 3: Cross multiply
    81,028.78x = 121,543.16 × 21,864.45
  4. Step 4: Simplify right side
    81,028.78x = 2,657,474,344.66
  5. Step 5: Solve for x
    x = 2,657,474,344.66/81,028.78
  6. Step 6: Final answer
    x = 32,796.67

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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.