Home / 79,912.36-119,870.70-20,746.72

Finding the Fourth Proportional to 79,912.36, 119,870.70 and 20,746.72

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Solution

The fourth proportional to 79,912.36, 119,870.70 and 20,746.72 is: 31,120.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,912.36 : 119,870.70 = 20,746.72 : x
  2. Step 2: Convert to fraction form
    79,912.36/119,870.70 = 20,746.72/x
  3. Step 3: Cross multiply
    79,912.36x = 119,870.70 × 20,746.72
  4. Step 4: Simplify right side
    79,912.36x = 2,486,923,849.10
  5. Step 5: Solve for x
    x = 2,486,923,849.10/79,912.36
  6. Step 6: Final answer
    x = 31,120.64

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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.