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Finding the Fourth Proportional to 216,902.39, 325,141.20 and 90,578.75

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Solution

The fourth proportional to 216,902.39, 325,141.20 and 90,578.75 is: 135,779.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,902.39 : 325,141.20 = 90,578.75 : x
  2. Step 2: Convert to fraction form
    216,902.39/325,141.20 = 90,578.75/x
  3. Step 3: Cross multiply
    216,902.39x = 325,141.20 × 90,578.75
  4. Step 4: Simplify right side
    216,902.39x = 29,450,881,843.79
  5. Step 5: Solve for x
    x = 29,450,881,843.79/216,902.39
  6. Step 6: Final answer
    x = 135,779.43

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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.