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Finding the Fourth Proportional to 68,636,932.80, 102,969,223.20 and 20,114,692.80

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Solution

The fourth proportional to 68,636,932.80, 102,969,223.20 and 20,114,692.80 is: 30,176,090.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,636,932.80 : 102,969,223.20 = 20,114,692.80 : x
  2. Step 2: Convert to fraction form
    68,636,932.80/102,969,223.20 = 20,114,692.80/x
  3. Step 3: Cross multiply
    68,636,932.80x = 102,969,223.20 × 20,114,692.80
  4. Step 4: Simplify right side
    68,636,932.80x = 2,071,194,292,522,633
  5. Step 5: Solve for x
    x = 2,071,194,292,522,633/68,636,932.80
  6. Step 6: Final answer
    x = 30,176,090.45

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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.