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Finding the Fourth Proportional to 259,048.78, 388,608.54 and 90,530.01

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Solution

The fourth proportional to 259,048.78, 388,608.54 and 90,530.01 is: 135,807.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,048.78 : 388,608.54 = 90,530.01 : x
  2. Step 2: Convert to fraction form
    259,048.78/388,608.54 = 90,530.01/x
  3. Step 3: Cross multiply
    259,048.78x = 388,608.54 × 90,530.01
  4. Step 4: Simplify right side
    259,048.78x = 35,180,735,518.92
  5. Step 5: Solve for x
    x = 35,180,735,518.92/259,048.78
  6. Step 6: Final answer
    x = 135,807.38

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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.