Home / 217,912.02-300,711.63-121,115.40

Finding the Fourth Proportional to 217,912.02, 300,711.63 and 121,115.40

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Solution

The fourth proportional to 217,912.02, 300,711.63 and 121,115.40 is: 167,135.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,912.02 : 300,711.63 = 121,115.40 : x
  2. Step 2: Convert to fraction form
    217,912.02/300,711.63 = 121,115.40/x
  3. Step 3: Cross multiply
    217,912.02x = 300,711.63 × 121,115.40
  4. Step 4: Simplify right side
    217,912.02x = 36,420,809,352.10
  5. Step 5: Solve for x
    x = 36,420,809,352.10/217,912.02
  6. Step 6: Final answer
    x = 167,135.38

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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.