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Finding the Fourth Proportional to 112,486.40, 168,729.60 and 111,708.80

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Solution

The fourth proportional to 112,486.40, 168,729.60 and 111,708.80 is: 167,563.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,486.40 : 168,729.60 = 111,708.80 : x
  2. Step 2: Convert to fraction form
    112,486.40/168,729.60 = 111,708.80/x
  3. Step 3: Cross multiply
    112,486.40x = 168,729.60 × 111,708.80
  4. Step 4: Simplify right side
    112,486.40x = 18,848,581,140.48
  5. Step 5: Solve for x
    x = 18,848,581,140.48/112,486.40
  6. Step 6: Final answer
    x = 167,563.20

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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.