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Finding the Fourth Proportional to 176,391.72, 243,631.62 and 128,568.36

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Solution

The fourth proportional to 176,391.72, 243,631.62 and 128,568.36 is: 177,578.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    176,391.72 : 243,631.62 = 128,568.36 : x
  2. Step 2: Convert to fraction form
    176,391.72/243,631.62 = 128,568.36/x
  3. Step 3: Cross multiply
    176,391.72x = 243,631.62 × 128,568.36
  4. Step 4: Simplify right side
    176,391.72x = 31,323,317,827.54
  5. Step 5: Solve for x
    x = 31,323,317,827.54/176,391.72
  6. Step 6: Final answer
    x = 177,578.16

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1.5x scale

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.