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Finding the Fourth Proportional to 139,969,175.70, 209,953,763.55 and 120,821,553.30

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Solution

The fourth proportional to 139,969,175.70, 209,953,763.55 and 120,821,553.30 is: 181,232,329.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,175.70 : 209,953,763.55 = 120,821,553.30 : x
  2. Step 2: Convert to fraction form
    139,969,175.70/209,953,763.55 = 120,821,553.30/x
  3. Step 3: Cross multiply
    139,969,175.70x = 209,953,763.55 × 120,821,553.30
  4. Step 4: Simplify right side
    139,969,175.70x = 25,366,939,833,291,924
  5. Step 5: Solve for x
    x = 25,366,939,833,291,924/139,969,175.70
  6. Step 6: Final answer
    x = 181,232,329.95

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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.