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Finding the Fourth Proportional to 216,504.80, 324,808.40 and 68,760.80

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Solution

The fourth proportional to 216,504.80, 324,808.40 and 68,760.80 is: 103,157.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,504.80 : 324,808.40 = 68,760.80 : x
  2. Step 2: Convert to fraction form
    216,504.80/324,808.40 = 68,760.80/x
  3. Step 3: Cross multiply
    216,504.80x = 324,808.40 × 68,760.80
  4. Step 4: Simplify right side
    216,504.80x = 22,334,085,430.72
  5. Step 5: Solve for x
    x = 22,334,085,430.72/216,504.80
  6. Step 6: Final answer
    x = 103,157.46

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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.