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Finding the Fourth Proportional to 139,745.52, 209,704.14 and 55,490.94

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Solution

The fourth proportional to 139,745.52, 209,704.14 and 55,490.94 is: 83,270.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,745.52 : 209,704.14 = 55,490.94 : x
  2. Step 2: Convert to fraction form
    139,745.52/209,704.14 = 55,490.94/x
  3. Step 3: Cross multiply
    139,745.52x = 209,704.14 × 55,490.94
  4. Step 4: Simplify right side
    139,745.52x = 11,636,679,850.49
  5. Step 5: Solve for x
    x = 11,636,679,850.49/139,745.52
  6. Step 6: Final answer
    x = 83,270.50

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1.5x scale

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.