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Finding the Fourth Proportional to 216,691.54, 325,081.64 and 74,518.36

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Solution

The fourth proportional to 216,691.54, 325,081.64 and 74,518.36 is: 111,792.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,691.54 : 325,081.64 = 74,518.36 : x
  2. Step 2: Convert to fraction form
    216,691.54/325,081.64 = 74,518.36/x
  3. Step 3: Cross multiply
    216,691.54x = 325,081.64 × 74,518.36
  4. Step 4: Simplify right side
    216,691.54x = 24,224,550,052.50
  5. Step 5: Solve for x
    x = 24,224,550,052.50/216,691.54
  6. Step 6: Final answer
    x = 111,792.78

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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.