Home / 139,968,692.70-209,953,039.05-120,821,070.30

Finding the Fourth Proportional to 139,968,692.70, 209,953,039.05 and 120,821,070.30

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Solution

The fourth proportional to 139,968,692.70, 209,953,039.05 and 120,821,070.30 is: 181,231,605.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,692.70 : 209,953,039.05 = 120,821,070.30 : x
  2. Step 2: Convert to fraction form
    139,968,692.70/209,953,039.05 = 120,821,070.30/x
  3. Step 3: Cross multiply
    139,968,692.70x = 209,953,039.05 × 120,821,070.30
  4. Step 4: Simplify right side
    139,968,692.70x = 25,366,750,890,758,696
  5. Step 5: Solve for x
    x = 25,366,750,890,758,696/139,968,692.70
  6. Step 6: Final answer
    x = 181,231,605.45

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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.