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Finding the Fourth Proportional to 111,990.40, 167,985.60 and 83,996.80

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Solution

The fourth proportional to 111,990.40, 167,985.60 and 83,996.80 is: 125,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,990.40 : 167,985.60 = 83,996.80 : x
  2. Step 2: Convert to fraction form
    111,990.40/167,985.60 = 83,996.80/x
  3. Step 3: Cross multiply
    111,990.40x = 167,985.60 × 83,996.80
  4. Step 4: Simplify right side
    111,990.40x = 14,110,252,846.08
  5. Step 5: Solve for x
    x = 14,110,252,846.08/111,990.40
  6. Step 6: Final answer
    x = 125,995.20

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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.