Home / 209,986.80-314,980.20-69,745.43

Finding the Fourth Proportional to 209,986.80, 314,980.20 and 69,745.43

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Solution

The fourth proportional to 209,986.80, 314,980.20 and 69,745.43 is: 104,618.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,986.80 : 314,980.20 = 69,745.43 : x
  2. Step 2: Convert to fraction form
    209,986.80/314,980.20 = 69,745.43/x
  3. Step 3: Cross multiply
    209,986.80x = 314,980.20 × 69,745.43
  4. Step 4: Simplify right side
    209,986.80x = 21,968,429,490.49
  5. Step 5: Solve for x
    x = 21,968,429,490.49/209,986.80
  6. Step 6: Final answer
    x = 104,618.15

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1.5x scale

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.