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Finding the Fourth Proportional to 128,647.92, 192,970.14 and 57,551.76

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Solution

The fourth proportional to 128,647.92, 192,970.14 and 57,551.76 is: 86,326.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,647.92 : 192,970.14 = 57,551.76 : x
  2. Step 2: Convert to fraction form
    128,647.92/192,970.14 = 57,551.76/x
  3. Step 3: Cross multiply
    128,647.92x = 192,970.14 × 57,551.76
  4. Step 4: Simplify right side
    128,647.92x = 11,105,771,184.45
  5. Step 5: Solve for x
    x = 11,105,771,184.45/128,647.92
  6. Step 6: Final answer
    x = 86,326.86

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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.