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Finding the Fourth Proportional to 130,243.40, 194,846.70 and 112,905.80

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Solution

The fourth proportional to 130,243.40, 194,846.70 and 112,905.80 is: 168,909.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,243.40 : 194,846.70 = 112,905.80 : x
  2. Step 2: Convert to fraction form
    130,243.40/194,846.70 = 112,905.80/x
  3. Step 3: Cross multiply
    130,243.40x = 194,846.70 × 112,905.80
  4. Step 4: Simplify right side
    130,243.40x = 21,999,322,540.86
  5. Step 5: Solve for x
    x = 21,999,322,540.86/130,243.40
  6. Step 6: Final answer
    x = 168,909.31

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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.