Home / 209,511.12-314,315.88-69,269.76

Finding the Fourth Proportional to 209,511.12, 314,315.88 and 69,269.76

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Solution

The fourth proportional to 209,511.12, 314,315.88 and 69,269.76 is: 103,920.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,511.12 : 314,315.88 = 69,269.76 : x
  2. Step 2: Convert to fraction form
    209,511.12/314,315.88 = 69,269.76/x
  3. Step 3: Cross multiply
    209,511.12x = 314,315.88 × 69,269.76
  4. Step 4: Simplify right side
    209,511.12x = 21,772,585,571.79
  5. Step 5: Solve for x
    x = 21,772,585,571.79/209,511.12
  6. Step 6: Final answer
    x = 103,920.91

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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.