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Finding the Fourth Proportional to 259,149.48, 388,585.71 and 81,608.82

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Solution

The fourth proportional to 259,149.48, 388,585.71 and 81,608.82 is: 122,369.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,149.48 : 388,585.71 = 81,608.82 : x
  2. Step 2: Convert to fraction form
    259,149.48/388,585.71 = 81,608.82/x
  3. Step 3: Cross multiply
    259,149.48x = 388,585.71 × 81,608.82
  4. Step 4: Simplify right side
    259,149.48x = 31,712,021,261.96
  5. Step 5: Solve for x
    x = 31,712,021,261.96/259,149.48
  6. Step 6: Final answer
    x = 122,369.61

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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.