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Finding the Fourth Proportional to 139,798.18, 209,662.09 and 39,958.90

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Solution

The fourth proportional to 139,798.18, 209,662.09 and 39,958.90 is: 59,928.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,798.18 : 209,662.09 = 39,958.90 : x
  2. Step 2: Convert to fraction form
    139,798.18/209,662.09 = 39,958.90/x
  3. Step 3: Cross multiply
    139,798.18x = 209,662.09 × 39,958.90
  4. Step 4: Simplify right side
    139,798.18x = 8,377,865,864.05
  5. Step 5: Solve for x
    x = 8,377,865,864.05/139,798.18
  6. Step 6: Final answer
    x = 59,928.29

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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.