Home / 66,775.28-100,172.82-19,390.77

Finding the Fourth Proportional to 66,775.28, 100,172.82 and 19,390.77

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Solution

The fourth proportional to 66,775.28, 100,172.82 and 19,390.77 is: 29,089.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,775.28 : 100,172.82 = 19,390.77 : x
  2. Step 2: Convert to fraction form
    66,775.28/100,172.82 = 19,390.77/x
  3. Step 3: Cross multiply
    66,775.28x = 100,172.82 × 19,390.77
  4. Step 4: Simplify right side
    66,775.28x = 1,942,428,112.87
  5. Step 5: Solve for x
    x = 1,942,428,112.87/66,775.28
  6. Step 6: Final answer
    x = 29,089.03

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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.