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Finding the Fourth Proportional to 139,711.80, 209,567.70 and 50,935.80

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Solution

The fourth proportional to 139,711.80, 209,567.70 and 50,935.80 is: 76,403.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,711.80 : 209,567.70 = 50,935.80 : x
  2. Step 2: Convert to fraction form
    139,711.80/209,567.70 = 50,935.80/x
  3. Step 3: Cross multiply
    139,711.80x = 209,567.70 × 50,935.80
  4. Step 4: Simplify right side
    139,711.80x = 10,674,498,453.66
  5. Step 5: Solve for x
    x = 10,674,498,453.66/139,711.80
  6. Step 6: Final answer
    x = 76,403.70

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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.