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Finding the Fourth Proportional to 199,697,910.40, 299,546,865.60 and 165,657,692.80

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Solution

The fourth proportional to 199,697,910.40, 299,546,865.60 and 165,657,692.80 is: 248,486,539.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,697,910.40 : 299,546,865.60 = 165,657,692.80 : x
  2. Step 2: Convert to fraction form
    199,697,910.40/299,546,865.60 = 165,657,692.80/x
  3. Step 3: Cross multiply
    199,697,910.40x = 299,546,865.60 × 165,657,692.80
  4. Step 4: Simplify right side
    199,697,910.40x = 49,622,242,640,767,696
  5. Step 5: Solve for x
    x = 49,622,242,640,767,696/199,697,910.40
  6. Step 6: Final answer
    x = 248,486,539.20

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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.