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Finding the Fourth Proportional to 61,207,515.60, 91,789,840.80 and 18,065,295.60

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Solution

The fourth proportional to 61,207,515.60, 91,789,840.80 and 18,065,295.60 is: 27,091,617.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,207,515.60 : 91,789,840.80 = 18,065,295.60 : x
  2. Step 2: Convert to fraction form
    61,207,515.60/91,789,840.80 = 18,065,295.60/x
  3. Step 3: Cross multiply
    61,207,515.60x = 91,789,840.80 × 18,065,295.60
  4. Step 4: Simplify right side
    61,207,515.60x = 1,658,210,607,128,940.50
  5. Step 5: Solve for x
    x = 1,658,210,607,128,940.50/61,207,515.60
  6. Step 6: Final answer
    x = 27,091,617.60

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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.