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Finding the Fourth Proportional to 192,485.80, 288,642.30 and 74,117.80

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Solution

The fourth proportional to 192,485.80, 288,642.30 and 74,117.80 is: 111,143.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,485.80 : 288,642.30 = 74,117.80 : x
  2. Step 2: Convert to fraction form
    192,485.80/288,642.30 = 74,117.80/x
  3. Step 3: Cross multiply
    192,485.80x = 288,642.30 × 74,117.80
  4. Step 4: Simplify right side
    192,485.80x = 21,393,532,262.94
  5. Step 5: Solve for x
    x = 21,393,532,262.94/192,485.80
  6. Step 6: Final answer
    x = 111,143.43

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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.