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Finding the Fourth Proportional to 139,969,289.70, 209,953,934.55 and 131,459,235.30

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Solution

The fourth proportional to 139,969,289.70, 209,953,934.55 and 131,459,235.30 is: 197,188,852.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,289.70 : 209,953,934.55 = 131,459,235.30 : x
  2. Step 2: Convert to fraction form
    139,969,289.70/209,953,934.55 = 131,459,235.30/x
  3. Step 3: Cross multiply
    139,969,289.70x = 209,953,934.55 × 131,459,235.30
  4. Step 4: Simplify right side
    139,969,289.70x = 27,600,383,684,169,252
  5. Step 5: Solve for x
    x = 27,600,383,684,169,252/139,969,289.70
  6. Step 6: Final answer
    x = 197,188,852.95

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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.