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Finding the Fourth Proportional to 216,430.52, 324,680.70 and 66,670.80

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Solution

The fourth proportional to 216,430.52, 324,680.70 and 66,670.80 is: 100,016.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,430.52 : 324,680.70 = 66,670.80 : x
  2. Step 2: Convert to fraction form
    216,430.52/324,680.70 = 66,670.80/x
  3. Step 3: Cross multiply
    216,430.52x = 324,680.70 × 66,670.80
  4. Step 4: Simplify right side
    216,430.52x = 21,646,722,013.56
  5. Step 5: Solve for x
    x = 21,646,722,013.56/216,430.52
  6. Step 6: Final answer
    x = 100,016.96

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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.