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Finding the Fourth Proportional to 139,765.49, 209,650.05 and 39,928.94

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Solution

The fourth proportional to 139,765.49, 209,650.05 and 39,928.94 is: 59,893.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,765.49 : 209,650.05 = 39,928.94 : x
  2. Step 2: Convert to fraction form
    139,765.49/209,650.05 = 39,928.94/x
  3. Step 3: Cross multiply
    139,765.49x = 209,650.05 × 39,928.94
  4. Step 4: Simplify right side
    139,765.49x = 8,371,103,219.20
  5. Step 5: Solve for x
    x = 8,371,103,219.20/139,765.49
  6. Step 6: Final answer
    x = 59,893.92

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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.