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Finding the Fourth Proportional to 111,988.40, 167,982.60 and 103,434.80

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Solution

The fourth proportional to 111,988.40, 167,982.60 and 103,434.80 is: 155,152.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,988.40 : 167,982.60 = 103,434.80 : x
  2. Step 2: Convert to fraction form
    111,988.40/167,982.60 = 103,434.80/x
  3. Step 3: Cross multiply
    111,988.40x = 167,982.60 × 103,434.80
  4. Step 4: Simplify right side
    111,988.40x = 17,375,246,634.48
  5. Step 5: Solve for x
    x = 17,375,246,634.48/111,988.40
  6. Step 6: Final answer
    x = 155,152.20

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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.