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Finding the Fourth Proportional to 216,967.87, 325,503.77 and 90,537.78

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Solution

The fourth proportional to 216,967.87, 325,503.77 and 90,537.78 is: 135,828.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,967.87 : 325,503.77 = 90,537.78 : x
  2. Step 2: Convert to fraction form
    216,967.87/325,503.77 = 90,537.78/x
  3. Step 3: Cross multiply
    216,967.87x = 325,503.77 × 90,537.78
  4. Step 4: Simplify right side
    216,967.87x = 29,470,390,115.15
  5. Step 5: Solve for x
    x = 29,470,390,115.15/216,967.87
  6. Step 6: Final answer
    x = 135,828.36

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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.