Home / 216,621.78-324,988.20-90,220.02

Finding the Fourth Proportional to 216,621.78, 324,988.20 and 90,220.02

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Solution

The fourth proportional to 216,621.78, 324,988.20 and 90,220.02 is: 135,353.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,621.78 : 324,988.20 = 90,220.02 : x
  2. Step 2: Convert to fraction form
    216,621.78/324,988.20 = 90,220.02/x
  3. Step 3: Cross multiply
    216,621.78x = 324,988.20 × 90,220.02
  4. Step 4: Simplify right side
    216,621.78x = 29,320,441,903.76
  5. Step 5: Solve for x
    x = 29,320,441,903.76/216,621.78
  6. Step 6: Final answer
    x = 135,353.16

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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.