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Finding the Fourth Proportional to 79,174,942.20, 118,762,413.30 and 66,420,358.20

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Solution

The fourth proportional to 79,174,942.20, 118,762,413.30 and 66,420,358.20 is: 99,630,537.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,174,942.20 : 118,762,413.30 = 66,420,358.20 : x
  2. Step 2: Convert to fraction form
    79,174,942.20/118,762,413.30 = 66,420,358.20/x
  3. Step 3: Cross multiply
    79,174,942.20x = 118,762,413.30 × 66,420,358.20
  4. Step 4: Simplify right side
    79,174,942.20x = 7,888,242,032,082,444
  5. Step 5: Solve for x
    x = 7,888,242,032,082,444/79,174,942.20
  6. Step 6: Final answer
    x = 99,630,537.30

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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.