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Finding the Fourth Proportional to 216,559.78, 324,621.56 and 90,269.93

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Solution

The fourth proportional to 216,559.78, 324,621.56 and 90,269.93 is: 135,313.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,559.78 : 324,621.56 = 90,269.93 : x
  2. Step 2: Convert to fraction form
    216,559.78/324,621.56 = 90,269.93/x
  3. Step 3: Cross multiply
    216,559.78x = 324,621.56 × 90,269.93
  4. Step 4: Simplify right side
    216,559.78x = 29,303,565,497.69
  5. Step 5: Solve for x
    x = 29,303,565,497.69/216,559.78
  6. Step 6: Final answer
    x = 135,313.98

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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.