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Finding the Fourth Proportional to 99,229.86, 136,936.64 and 53,907.48

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Solution

The fourth proportional to 99,229.86, 136,936.64 and 53,907.48 is: 74,392.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,229.86 : 136,936.64 = 53,907.48 : x
  2. Step 2: Convert to fraction form
    99,229.86/136,936.64 = 53,907.48/x
  3. Step 3: Cross multiply
    99,229.86x = 136,936.64 × 53,907.48
  4. Step 4: Simplify right side
    99,229.86x = 7,381,909,182.07
  5. Step 5: Solve for x
    x = 7,381,909,182.07/99,229.86
  6. Step 6: Final answer
    x = 74,392.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.