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Finding the Fourth Proportional to 216,572.01, 324,880.29 and 81,749.64

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Solution

The fourth proportional to 216,572.01, 324,880.29 and 81,749.64 is: 122,632.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,572.01 : 324,880.29 = 81,749.64 : x
  2. Step 2: Convert to fraction form
    216,572.01/324,880.29 = 81,749.64/x
  3. Step 3: Cross multiply
    216,572.01x = 324,880.29 × 81,749.64
  4. Step 4: Simplify right side
    216,572.01x = 26,558,845,126.19
  5. Step 5: Solve for x
    x = 26,558,845,126.19/216,572.01
  6. Step 6: Final answer
    x = 122,632.86

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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.