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Finding the Fourth Proportional to 216,201.80, 324,129.90 and 91,440.20

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Solution

The fourth proportional to 216,201.80, 324,129.90 and 91,440.20 is: 137,087.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,201.80 : 324,129.90 = 91,440.20 : x
  2. Step 2: Convert to fraction form
    216,201.80/324,129.90 = 91,440.20/x
  3. Step 3: Cross multiply
    216,201.80x = 324,129.90 × 91,440.20
  4. Step 4: Simplify right side
    216,201.80x = 29,638,502,881.98
  5. Step 5: Solve for x
    x = 29,638,502,881.98/216,201.80
  6. Step 6: Final answer
    x = 137,087.22

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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.