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Finding the Fourth Proportional to 258,993.51, 388,550.36 and 81,495.91

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Solution

The fourth proportional to 258,993.51, 388,550.36 and 81,495.91 is: 122,262.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,993.51 : 388,550.36 = 81,495.91 : x
  2. Step 2: Convert to fraction form
    258,993.51/388,550.36 = 81,495.91/x
  3. Step 3: Cross multiply
    258,993.51x = 388,550.36 × 81,495.91
  4. Step 4: Simplify right side
    258,993.51x = 31,665,263,226.28
  5. Step 5: Solve for x
    x = 31,665,263,226.28/258,993.51
  6. Step 6: Final answer
    x = 122,262.77

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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.