Home / 2,100,078.40-3,151,672.80-1,389,870.40

Finding the Fourth Proportional to 2,100,078.40, 3,151,672.80 and 1,389,870.40

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Solution

The fourth proportional to 2,100,078.40, 3,151,672.80 and 1,389,870.40 is: 2,085,834.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100,078.40 : 3,151,672.80 = 1,389,870.40 : x
  2. Step 2: Convert to fraction form
    2,100,078.40/3,151,672.80 = 1,389,870.40/x
  3. Step 3: Cross multiply
    2,100,078.40x = 3,151,672.80 × 1,389,870.40
  4. Step 4: Simplify right side
    2,100,078.40x = 4,380,416,735,205.12
  5. Step 5: Solve for x
    x = 4,380,416,735,205.12/2,100,078.40
  6. Step 6: Final answer
    x = 2,085,834.86

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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.