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Finding the Fourth Proportional to 69,938.53, 104,908.80 and 20,018.66

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Solution

The fourth proportional to 69,938.53, 104,908.80 and 20,018.66 is: 30,028.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,938.53 : 104,908.80 = 20,018.66 : x
  2. Step 2: Convert to fraction form
    69,938.53/104,908.80 = 20,018.66/x
  3. Step 3: Cross multiply
    69,938.53x = 104,908.80 × 20,018.66
  4. Step 4: Simplify right side
    69,938.53x = 2,100,133,598.21
  5. Step 5: Solve for x
    x = 2,100,133,598.21/69,938.53
  6. Step 6: Final answer
    x = 30,028.28

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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.