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Finding the Fourth Proportional to 258,764.63, 388,195.94 and 90,333.02

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Solution

The fourth proportional to 258,764.63, 388,195.94 and 90,333.02 is: 135,516.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,764.63 : 388,195.94 = 90,333.02 : x
  2. Step 2: Convert to fraction form
    258,764.63/388,195.94 = 90,333.02/x
  3. Step 3: Cross multiply
    258,764.63x = 388,195.94 × 90,333.02
  4. Step 4: Simplify right side
    258,764.63x = 35,066,912,808.26
  5. Step 5: Solve for x
    x = 35,066,912,808.26/258,764.63
  6. Step 6: Final answer
    x = 135,516.64

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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.