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Finding the Fourth Proportional to 111,858.80, 167,788.20 and 91,378.80

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Solution

The fourth proportional to 111,858.80, 167,788.20 and 91,378.80 is: 137,068.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,858.80 : 167,788.20 = 91,378.80 : x
  2. Step 2: Convert to fraction form
    111,858.80/167,788.20 = 91,378.80/x
  3. Step 3: Cross multiply
    111,858.80x = 167,788.20 × 91,378.80
  4. Step 4: Simplify right side
    111,858.80x = 15,332,284,370.16
  5. Step 5: Solve for x
    x = 15,332,284,370.16/111,858.80
  6. Step 6: Final answer
    x = 137,068.20

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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.