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Finding the Fourth Proportional to 139,289.79, 209,017.68 and 50,550.21

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Solution

The fourth proportional to 139,289.79, 209,017.68 and 50,550.21 is: 75,855.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,289.79 : 209,017.68 = 50,550.21 : x
  2. Step 2: Convert to fraction form
    139,289.79/209,017.68 = 50,550.21/x
  3. Step 3: Cross multiply
    139,289.79x = 209,017.68 × 50,550.21
  4. Step 4: Simplify right side
    139,289.79x = 10,565,887,617.71
  5. Step 5: Solve for x
    x = 10,565,887,617.71/139,289.79
  6. Step 6: Final answer
    x = 75,855.44

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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.