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Finding the Fourth Proportional to 216,686.54, 324,945.57 and 74,504.81

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Solution

The fourth proportional to 216,686.54, 324,945.57 and 74,504.81 is: 111,728.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,686.54 : 324,945.57 = 74,504.81 : x
  2. Step 2: Convert to fraction form
    216,686.54/324,945.57 = 74,504.81/x
  3. Step 3: Cross multiply
    216,686.54x = 324,945.57 × 74,504.81
  4. Step 4: Simplify right side
    216,686.54x = 24,210,007,953.19
  5. Step 5: Solve for x
    x = 24,210,007,953.19/216,686.54
  6. Step 6: Final answer
    x = 111,728.25

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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.