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Finding the Fourth Proportional to 137,894.51, 190,316.58 and 128,889.54

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Solution

The fourth proportional to 137,894.51, 190,316.58 and 128,889.54 is: 177,888.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,894.51 : 190,316.58 = 128,889.54 : x
  2. Step 2: Convert to fraction form
    137,894.51/190,316.58 = 128,889.54/x
  3. Step 3: Cross multiply
    137,894.51x = 190,316.58 × 128,889.54
  4. Step 4: Simplify right side
    137,894.51x = 24,529,815,967.24
  5. Step 5: Solve for x
    x = 24,529,815,967.24/137,894.51
  6. Step 6: Final answer
    x = 177,888.27

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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.