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Finding the Fourth Proportional to 111,504.70, 167,257.05 and 78,262.30

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Solution

The fourth proportional to 111,504.70, 167,257.05 and 78,262.30 is: 117,393.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,504.70 : 167,257.05 = 78,262.30 : x
  2. Step 2: Convert to fraction form
    111,504.70/167,257.05 = 78,262.30/x
  3. Step 3: Cross multiply
    111,504.70x = 167,257.05 × 78,262.30
  4. Step 4: Simplify right side
    111,504.70x = 13,089,921,424.22
  5. Step 5: Solve for x
    x = 13,089,921,424.22/111,504.70
  6. Step 6: Final answer
    x = 117,393.45

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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.