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Finding the Fourth Proportional to 66,285.78, 99,413.74 and 18,899.92

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Solution

The fourth proportional to 66,285.78, 99,413.74 and 18,899.92 is: 28,345.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,285.78 : 99,413.74 = 18,899.92 : x
  2. Step 2: Convert to fraction form
    66,285.78/99,413.74 = 18,899.92/x
  3. Step 3: Cross multiply
    66,285.78x = 99,413.74 × 18,899.92
  4. Step 4: Simplify right side
    66,285.78x = 1,878,911,732.90
  5. Step 5: Solve for x
    x = 1,878,911,732.90/66,285.78
  6. Step 6: Final answer
    x = 28,345.62

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1.5x scale

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.