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Finding the Fourth Proportional to 225,081.79, 310,578.35 and 129,570.02

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Solution

The fourth proportional to 225,081.79, 310,578.35 and 129,570.02 is: 178,786.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,081.79 : 310,578.35 = 129,570.02 : x
  2. Step 2: Convert to fraction form
    225,081.79/310,578.35 = 129,570.02/x
  3. Step 3: Cross multiply
    225,081.79x = 310,578.35 × 129,570.02
  4. Step 4: Simplify right side
    225,081.79x = 40,241,643,021.07
  5. Step 5: Solve for x
    x = 40,241,643,021.07/225,081.79
  6. Step 6: Final answer
    x = 178,786.76

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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.