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Finding the Fourth Proportional to 111,771.80, 167,220.30 and 72,405.80

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Solution

The fourth proportional to 111,771.80, 167,220.30 and 72,405.80 is: 108,325.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,771.80 : 167,220.30 = 72,405.80 : x
  2. Step 2: Convert to fraction form
    111,771.80/167,220.30 = 72,405.80/x
  3. Step 3: Cross multiply
    111,771.80x = 167,220.30 × 72,405.80
  4. Step 4: Simplify right side
    111,771.80x = 12,107,719,597.74
  5. Step 5: Solve for x
    x = 12,107,719,597.74/111,771.80
  6. Step 6: Final answer
    x = 108,325.35

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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.