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Finding the Fourth Proportional to 108,963.66, 163,691.54 and 64,619.51

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Solution

The fourth proportional to 108,963.66, 163,691.54 and 64,619.51 is: 97,075.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,963.66 : 163,691.54 = 64,619.51 : x
  2. Step 2: Convert to fraction form
    108,963.66/163,691.54 = 64,619.51/x
  3. Step 3: Cross multiply
    108,963.66x = 163,691.54 × 64,619.51
  4. Step 4: Simplify right side
    108,963.66x = 10,577,667,105.95
  5. Step 5: Solve for x
    x = 10,577,667,105.95/108,963.66
  6. Step 6: Final answer
    x = 97,075.18

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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.