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Finding the Fourth Proportional to 209,912.88, 289,515.96 and 134,468.40

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Solution

The fourth proportional to 209,912.88, 289,515.96 and 134,468.40 is: 185,461.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,912.88 : 289,515.96 = 134,468.40 : x
  2. Step 2: Convert to fraction form
    209,912.88/289,515.96 = 134,468.40/x
  3. Step 3: Cross multiply
    209,912.88x = 289,515.96 × 134,468.40
  4. Step 4: Simplify right side
    209,912.88x = 38,930,747,915.66
  5. Step 5: Solve for x
    x = 38,930,747,915.66/209,912.88
  6. Step 6: Final answer
    x = 185,461.45

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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.