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Finding the Fourth Proportional to 66,415,269.80, 99,622,904.70 and 55,077,861.80

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Solution

The fourth proportional to 66,415,269.80, 99,622,904.70 and 55,077,861.80 is: 82,616,792.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,415,269.80 : 99,622,904.70 = 55,077,861.80 : x
  2. Step 2: Convert to fraction form
    66,415,269.80/99,622,904.70 = 55,077,861.80/x
  3. Step 3: Cross multiply
    66,415,269.80x = 99,622,904.70 × 55,077,861.80
  4. Step 4: Simplify right side
    66,415,269.80x = 5,487,016,577,181,170
  5. Step 5: Solve for x
    x = 5,487,016,577,181,170/66,415,269.80
  6. Step 6: Final answer
    x = 82,616,792.70

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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.