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Finding the Fourth Proportional to 108,701.20, 163,124.70 and 64,280.80

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Solution

The fourth proportional to 108,701.20, 163,124.70 and 64,280.80 is: 96,464.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,701.20 : 163,124.70 = 64,280.80 : x
  2. Step 2: Convert to fraction form
    108,701.20/163,124.70 = 64,280.80/x
  3. Step 3: Cross multiply
    108,701.20x = 163,124.70 × 64,280.80
  4. Step 4: Simplify right side
    108,701.20x = 10,485,786,215.76
  5. Step 5: Solve for x
    x = 10,485,786,215.76/108,701.20
  6. Step 6: Final answer
    x = 96,464.31

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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.