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Finding the Fourth Proportional to 216,580.72, 324,901.62 and 66,833.20

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Solution

The fourth proportional to 216,580.72, 324,901.62 and 66,833.20 is: 100,259.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,580.72 : 324,901.62 = 66,833.20 : x
  2. Step 2: Convert to fraction form
    216,580.72/324,901.62 = 66,833.20/x
  3. Step 3: Cross multiply
    216,580.72x = 324,901.62 × 66,833.20
  4. Step 4: Simplify right side
    216,580.72x = 21,714,214,949.78
  5. Step 5: Solve for x
    x = 21,714,214,949.78/216,580.72
  6. Step 6: Final answer
    x = 100,259.22

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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.