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Finding the Fourth Proportional to 258,736.67, 388,106.82 and 90,256.26

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Solution

The fourth proportional to 258,736.67, 388,106.82 and 90,256.26 is: 135,385.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,736.67 : 388,106.82 = 90,256.26 : x
  2. Step 2: Convert to fraction form
    258,736.67/388,106.82 = 90,256.26/x
  3. Step 3: Cross multiply
    258,736.67x = 388,106.82 × 90,256.26
  4. Step 4: Simplify right side
    258,736.67x = 35,029,070,053.69
  5. Step 5: Solve for x
    x = 35,029,070,053.69/258,736.67
  6. Step 6: Final answer
    x = 135,385.03

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1.5x scale

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.