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Finding the Fourth Proportional to 98,784.48, 136,322.64 and 54,072.48

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Solution

The fourth proportional to 98,784.48, 136,322.64 and 54,072.48 is: 74,620.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,784.48 : 136,322.64 = 54,072.48 : x
  2. Step 2: Convert to fraction form
    98,784.48/136,322.64 = 54,072.48/x
  3. Step 3: Cross multiply
    98,784.48x = 136,322.64 × 54,072.48
  4. Step 4: Simplify right side
    98,784.48x = 7,371,303,224.95
  5. Step 5: Solve for x
    x = 7,371,303,224.95/98,784.48
  6. Step 6: Final answer
    x = 74,620.05

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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.