Home / 208,512,005.80-312,768,008.70-192,387,692.20

Finding the Fourth Proportional to 208,512,005.80, 312,768,008.70 and 192,387,692.20

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Solution

The fourth proportional to 208,512,005.80, 312,768,008.70 and 192,387,692.20 is: 288,581,538.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,512,005.80 : 312,768,008.70 = 192,387,692.20 : x
  2. Step 2: Convert to fraction form
    208,512,005.80/312,768,008.70 = 192,387,692.20/x
  3. Step 3: Cross multiply
    208,512,005.80x = 312,768,008.70 × 192,387,692.20
  4. Step 4: Simplify right side
    208,512,005.80x = 60,172,715,387,782,520
  5. Step 5: Solve for x
    x = 60,172,715,387,782,520/208,512,005.80
  6. Step 6: Final answer
    x = 288,581,538.30

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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.