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Finding the Fourth Proportional to 203,505.76, 280,787.88 and 121,860.82

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Solution

The fourth proportional to 203,505.76, 280,787.88 and 121,860.82 is: 168,137.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,505.76 : 280,787.88 = 121,860.82 : x
  2. Step 2: Convert to fraction form
    203,505.76/280,787.88 = 121,860.82/x
  3. Step 3: Cross multiply
    203,505.76x = 280,787.88 × 121,860.82
  4. Step 4: Simplify right side
    203,505.76x = 34,217,041,302.86
  5. Step 5: Solve for x
    x = 34,217,041,302.86/203,505.76
  6. Step 6: Final answer
    x = 168,137.95

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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.