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Finding the Fourth Proportional to 111,938.10, 167,797.80 and 100,128.30

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Solution

The fourth proportional to 111,938.10, 167,797.80 and 100,128.30 is: 150,094.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,938.10 : 167,797.80 = 100,128.30 : x
  2. Step 2: Convert to fraction form
    111,938.10/167,797.80 = 100,128.30/x
  3. Step 3: Cross multiply
    111,938.10x = 167,797.80 × 100,128.30
  4. Step 4: Simplify right side
    111,938.10x = 16,801,308,457.74
  5. Step 5: Solve for x
    x = 16,801,308,457.74/111,938.10
  6. Step 6: Final answer
    x = 150,094.64

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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.