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Finding the Fourth Proportional to 61,866.98, 85,413.10 and 40,682.78

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Solution

The fourth proportional to 61,866.98, 85,413.10 and 40,682.78 is: 56,166.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,866.98 : 85,413.10 = 40,682.78 : x
  2. Step 2: Convert to fraction form
    61,866.98/85,413.10 = 40,682.78/x
  3. Step 3: Cross multiply
    61,866.98x = 85,413.10 × 40,682.78
  4. Step 4: Simplify right side
    61,866.98x = 3,474,842,356.42
  5. Step 5: Solve for x
    x = 3,474,842,356.42/61,866.98
  6. Step 6: Final answer
    x = 56,166.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.