Home / 78,004,015.20-117,006,022.80-55,329,199.20

Finding the Fourth Proportional to 78,004,015.20, 117,006,022.80 and 55,329,199.20

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Solution

The fourth proportional to 78,004,015.20, 117,006,022.80 and 55,329,199.20 is: 82,993,798.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,004,015.20 : 117,006,022.80 = 55,329,199.20 : x
  2. Step 2: Convert to fraction form
    78,004,015.20/117,006,022.80 = 55,329,199.20/x
  3. Step 3: Cross multiply
    78,004,015.20x = 117,006,022.80 × 55,329,199.20
  4. Step 4: Simplify right side
    78,004,015.20x = 6,473,849,543,100,942
  5. Step 5: Solve for x
    x = 6,473,849,543,100,942/78,004,015.20
  6. Step 6: Final answer
    x = 82,993,798.80

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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.