Home / 130,942.89-196,500.42-71,820

Finding the Fourth Proportional to 130,942.89, 196,500.42 and 71,820

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Solution

The fourth proportional to 130,942.89, 196,500.42 and 71,820 is: 107,777.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,942.89 : 196,500.42 = 71,820 : x
  2. Step 2: Convert to fraction form
    130,942.89/196,500.42 = 71,820/x
  3. Step 3: Cross multiply
    130,942.89x = 196,500.42 × 71,820
  4. Step 4: Simplify right side
    130,942.89x = 14,112,660,164.40
  5. Step 5: Solve for x
    x = 14,112,660,164.40/130,942.89
  6. Step 6: Final answer
    x = 107,777.22

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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.