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Finding the Fourth Proportional to 258,544.58, 387,805.59 and 81,047.54

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Solution

The fourth proportional to 258,544.58, 387,805.59 and 81,047.54 is: 121,567.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,544.58 : 387,805.59 = 81,047.54 : x
  2. Step 2: Convert to fraction form
    258,544.58/387,805.59 = 81,047.54/x
  3. Step 3: Cross multiply
    258,544.58x = 387,805.59 × 81,047.54
  4. Step 4: Simplify right side
    258,544.58x = 31,430,689,067.75
  5. Step 5: Solve for x
    x = 31,430,689,067.75/258,544.58
  6. Step 6: Final answer
    x = 121,567.77

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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.