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Finding the Fourth Proportional to 216,693.60, 324,821.70 and 98,449.80

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Solution

The fourth proportional to 216,693.60, 324,821.70 and 98,449.80 is: 147,575.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,693.60 : 324,821.70 = 98,449.80 : x
  2. Step 2: Convert to fraction form
    216,693.60/324,821.70 = 98,449.80/x
  3. Step 3: Cross multiply
    216,693.60x = 324,821.70 × 98,449.80
  4. Step 4: Simplify right side
    216,693.60x = 31,978,631,400.66
  5. Step 5: Solve for x
    x = 31,978,631,400.66/216,693.60
  6. Step 6: Final answer
    x = 147,575.34

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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.