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Finding the Fourth Proportional to 216,600.81, 324,820.31 and 74,405.72

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Solution

The fourth proportional to 216,600.81, 324,820.31 and 74,405.72 is: 111,580.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,600.81 : 324,820.31 = 74,405.72 : x
  2. Step 2: Convert to fraction form
    216,600.81/324,820.31 = 74,405.72/x
  3. Step 3: Cross multiply
    216,600.81x = 324,820.31 × 74,405.72
  4. Step 4: Simplify right side
    216,600.81x = 24,168,487,040.04
  5. Step 5: Solve for x
    x = 24,168,487,040.04/216,600.81
  6. Step 6: Final answer
    x = 111,580.78

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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.