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Finding the Fourth Proportional to 66,413.20, 99,619.80 and 63,351.40

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Solution

The fourth proportional to 66,413.20, 99,619.80 and 63,351.40 is: 95,027.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,413.20 : 99,619.80 = 63,351.40 : x
  2. Step 2: Convert to fraction form
    66,413.20/99,619.80 = 63,351.40/x
  3. Step 3: Cross multiply
    66,413.20x = 99,619.80 × 63,351.40
  4. Step 4: Simplify right side
    66,413.20x = 6,311,053,797.72
  5. Step 5: Solve for x
    x = 6,311,053,797.72/66,413.20
  6. Step 6: Final answer
    x = 95,027.10

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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.