Home / 139,173.28-208,715.76-80,036.80

Finding the Fourth Proportional to 139,173.28, 208,715.76 and 80,036.80

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Solution

The fourth proportional to 139,173.28, 208,715.76 and 80,036.80 is: 120,029.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,173.28 : 208,715.76 = 80,036.80 : x
  2. Step 2: Convert to fraction form
    139,173.28/208,715.76 = 80,036.80/x
  3. Step 3: Cross multiply
    139,173.28x = 208,715.76 × 80,036.80
  4. Step 4: Simplify right side
    139,173.28x = 16,704,941,539.97
  5. Step 5: Solve for x
    x = 16,704,941,539.97/139,173.28
  6. Step 6: Final answer
    x = 120,029.80

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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.