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Finding the Fourth Proportional to 174,620.80, 261,931.20 and 118,487.80

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Solution

The fourth proportional to 174,620.80, 261,931.20 and 118,487.80 is: 177,731.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,620.80 : 261,931.20 = 118,487.80 : x
  2. Step 2: Convert to fraction form
    174,620.80/261,931.20 = 118,487.80/x
  3. Step 3: Cross multiply
    174,620.80x = 261,931.20 × 118,487.80
  4. Step 4: Simplify right side
    174,620.80x = 31,035,651,639.36
  5. Step 5: Solve for x
    x = 31,035,651,639.36/174,620.80
  6. Step 6: Final answer
    x = 177,731.70

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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.