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Finding the Fourth Proportional to 128,879.93, 193,461.32 and 102,396.16

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Solution

The fourth proportional to 128,879.93, 193,461.32 and 102,396.16 is: 153,706.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,879.93 : 193,461.32 = 102,396.16 : x
  2. Step 2: Convert to fraction form
    128,879.93/193,461.32 = 102,396.16/x
  3. Step 3: Cross multiply
    128,879.93x = 193,461.32 × 102,396.16
  4. Step 4: Simplify right side
    128,879.93x = 19,809,696,774.35
  5. Step 5: Solve for x
    x = 19,809,696,774.35/128,879.93
  6. Step 6: Final answer
    x = 153,706.60

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1.5x scale

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.