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Finding the Fourth Proportional to 118,420.66, 163,529.62 and 76,053

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Solution

The fourth proportional to 118,420.66, 163,529.62 and 76,053 is: 105,023.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,420.66 : 163,529.62 = 76,053 : x
  2. Step 2: Convert to fraction form
    118,420.66/163,529.62 = 76,053/x
  3. Step 3: Cross multiply
    118,420.66x = 163,529.62 × 76,053
  4. Step 4: Simplify right side
    118,420.66x = 12,436,917,999.73
  5. Step 5: Solve for x
    x = 12,436,917,999.73/118,420.66
  6. Step 6: Final answer
    x = 105,023.21

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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.