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Finding the Fourth Proportional to 69,203.03, 103,804.49 and 53,431

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Solution

The fourth proportional to 69,203.03, 103,804.49 and 53,431 is: 80,146.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,203.03 : 103,804.49 = 53,431 : x
  2. Step 2: Convert to fraction form
    69,203.03/103,804.49 = 53,431/x
  3. Step 3: Cross multiply
    69,203.03x = 103,804.49 × 53,431
  4. Step 4: Simplify right side
    69,203.03x = 5,546,377,705.19
  5. Step 5: Solve for x
    x = 5,546,377,705.19/69,203.03
  6. Step 6: Final answer
    x = 80,146.46

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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.