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Finding the Fourth Proportional to 85,998,420.15, 120,737,910.45 and 85,998,420.15

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Solution

The fourth proportional to 85,998,420.15, 120,737,910.45 and 85,998,420.15 is: 120,737,910.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,998,420.15 : 120,737,910.45 = 85,998,420.15 : x
  2. Step 2: Convert to fraction form
    85,998,420.15/120,737,910.45 = 85,998,420.15/x
  3. Step 3: Cross multiply
    85,998,420.15x = 120,737,910.45 × 85,998,420.15
  4. Step 4: Simplify right side
    85,998,420.15x = 10,383,269,550,912,176
  5. Step 5: Solve for x
    x = 10,383,269,550,912,176/85,998,420.15
  6. Step 6: Final answer
    x = 120,737,910.45

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.