Home / 111,530.20-167,295.30-78,287.80

Finding the Fourth Proportional to 111,530.20, 167,295.30 and 78,287.80

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Solution

The fourth proportional to 111,530.20, 167,295.30 and 78,287.80 is: 117,431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,530.20 : 167,295.30 = 78,287.80 : x
  2. Step 2: Convert to fraction form
    111,530.20/167,295.30 = 78,287.80/x
  3. Step 3: Cross multiply
    111,530.20x = 167,295.30 × 78,287.80
  4. Step 4: Simplify right side
    111,530.20x = 13,097,180,987.34
  5. Step 5: Solve for x
    x = 13,097,180,987.34/111,530.20
  6. Step 6: Final answer
    x = 117,431.70

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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.