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Finding the Fourth Proportional to 217,160.79, 299,698.86 and 139,705.60

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Solution

The fourth proportional to 217,160.79, 299,698.86 and 139,705.60 is: 192,804.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,160.79 : 299,698.86 = 139,705.60 : x
  2. Step 2: Convert to fraction form
    217,160.79/299,698.86 = 139,705.60/x
  3. Step 3: Cross multiply
    217,160.79x = 299,698.86 × 139,705.60
  4. Step 4: Simplify right side
    217,160.79x = 41,869,609,055.62
  5. Step 5: Solve for x
    x = 41,869,609,055.62/217,160.79
  6. Step 6: Final answer
    x = 192,804.65

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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.