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Finding the Fourth Proportional to 139,448.08, 209,162.52 and 80,240.08

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Solution

The fourth proportional to 139,448.08, 209,162.52 and 80,240.08 is: 120,354.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,448.08 : 209,162.52 = 80,240.08 : x
  2. Step 2: Convert to fraction form
    139,448.08/209,162.52 = 80,240.08/x
  3. Step 3: Cross multiply
    139,448.08x = 209,162.52 × 80,240.08
  4. Step 4: Simplify right side
    139,448.08x = 16,783,217,337.80
  5. Step 5: Solve for x
    x = 16,783,217,337.80/139,448.08
  6. Step 6: Final answer
    x = 120,354.60

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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.