Home / 209,399.40-288,892.80-123,305.76

Finding the Fourth Proportional to 209,399.40, 288,892.80 and 123,305.76

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Solution

The fourth proportional to 209,399.40, 288,892.80 and 123,305.76 is: 170,115.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,399.40 : 288,892.80 = 123,305.76 : x
  2. Step 2: Convert to fraction form
    209,399.40/288,892.80 = 123,305.76/x
  3. Step 3: Cross multiply
    209,399.40x = 288,892.80 × 123,305.76
  4. Step 4: Simplify right side
    209,399.40x = 35,622,146,262.53
  5. Step 5: Solve for x
    x = 35,622,146,262.53/209,399.40
  6. Step 6: Final answer
    x = 170,115.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.