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Finding the Fourth Proportional to 216,753.42, 325,223.54 and 90,418.55

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Solution

The fourth proportional to 216,753.42, 325,223.54 and 90,418.55 is: 135,666.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,753.42 : 325,223.54 = 90,418.55 : x
  2. Step 2: Convert to fraction form
    216,753.42/325,223.54 = 90,418.55/x
  3. Step 3: Cross multiply
    216,753.42x = 325,223.54 × 90,418.55
  4. Step 4: Simplify right side
    216,753.42x = 29,406,240,912.67
  5. Step 5: Solve for x
    x = 29,406,240,912.67/216,753.42
  6. Step 6: Final answer
    x = 135,666.79

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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.