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Finding the Fourth Proportional to 216,289.90, 324,465.90 and 66,542.77

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Solution

The fourth proportional to 216,289.90, 324,465.90 and 66,542.77 is: 99,823.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,289.90 : 324,465.90 = 66,542.77 : x
  2. Step 2: Convert to fraction form
    216,289.90/324,465.90 = 66,542.77/x
  3. Step 3: Cross multiply
    216,289.90x = 324,465.90 × 66,542.77
  4. Step 4: Simplify right side
    216,289.90x = 21,590,859,756.54
  5. Step 5: Solve for x
    x = 21,590,859,756.54/216,289.90
  6. Step 6: Final answer
    x = 99,823.71

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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.