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Finding the Fourth Proportional to 216,218.53, 324,218.91 and 72,073.32

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Solution

The fourth proportional to 216,218.53, 324,218.91 and 72,073.32 is: 108,073.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,218.53 : 324,218.91 = 72,073.32 : x
  2. Step 2: Convert to fraction form
    216,218.53/324,218.91 = 72,073.32/x
  3. Step 3: Cross multiply
    216,218.53x = 324,218.91 × 72,073.32
  4. Step 4: Simplify right side
    216,218.53x = 23,367,533,250.48
  5. Step 5: Solve for x
    x = 23,367,533,250.48/216,218.53
  6. Step 6: Final answer
    x = 108,073.68

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1.5x scale

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.