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Finding the Fourth Proportional to 99,968.40, 149,804.64 and 43,756.56

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Solution

The fourth proportional to 99,968.40, 149,804.64 and 43,756.56 is: 65,570.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,968.40 : 149,804.64 = 43,756.56 : x
  2. Step 2: Convert to fraction form
    99,968.40/149,804.64 = 43,756.56/x
  3. Step 3: Cross multiply
    99,968.40x = 149,804.64 × 43,756.56
  4. Step 4: Simplify right side
    99,968.40x = 6,554,935,718.44
  5. Step 5: Solve for x
    x = 6,554,935,718.44/99,968.40
  6. Step 6: Final answer
    x = 65,570.08

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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.