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Finding the Fourth Proportional to 136,880.31, 205,684.95 and 73,748.91

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Solution

The fourth proportional to 136,880.31, 205,684.95 and 73,748.91 is: 110,819.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,880.31 : 205,684.95 = 73,748.91 : x
  2. Step 2: Convert to fraction form
    136,880.31/205,684.95 = 73,748.91/x
  3. Step 3: Cross multiply
    136,880.31x = 205,684.95 × 73,748.91
  4. Step 4: Simplify right side
    136,880.31x = 15,169,040,865.90
  5. Step 5: Solve for x
    x = 15,169,040,865.90/136,880.31
  6. Step 6: Final answer
    x = 110,819.74

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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.