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Finding the Fourth Proportional to 118,332.80, 177,628.80 and 74,009.60

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Solution

The fourth proportional to 118,332.80, 177,628.80 and 74,009.60 is: 111,095.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,332.80 : 177,628.80 = 74,009.60 : x
  2. Step 2: Convert to fraction form
    118,332.80/177,628.80 = 74,009.60/x
  3. Step 3: Cross multiply
    118,332.80x = 177,628.80 × 74,009.60
  4. Step 4: Simplify right side
    118,332.80x = 13,146,236,436.48
  5. Step 5: Solve for x
    x = 13,146,236,436.48/118,332.80
  6. Step 6: Final answer
    x = 111,095.46

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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.