Home / 54,858.89-75,708.54-30,987.79

Finding the Fourth Proportional to 54,858.89, 75,708.54 and 30,987.79

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Solution

The fourth proportional to 54,858.89, 75,708.54 and 30,987.79 is: 42,764.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,858.89 : 75,708.54 = 30,987.79 : x
  2. Step 2: Convert to fraction form
    54,858.89/75,708.54 = 30,987.79/x
  3. Step 3: Cross multiply
    54,858.89x = 75,708.54 × 30,987.79
  4. Step 4: Simplify right side
    54,858.89x = 2,346,040,149.46
  5. Step 5: Solve for x
    x = 2,346,040,149.46/54,858.89
  6. Step 6: Final answer
    x = 42,764.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.