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Finding the Fourth Proportional to 128,446.56, 177,257.52 and 77,461.92

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Solution

The fourth proportional to 128,446.56, 177,257.52 and 77,461.92 is: 106,898.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,446.56 : 177,257.52 = 77,461.92 : x
  2. Step 2: Convert to fraction form
    128,446.56/177,257.52 = 77,461.92/x
  3. Step 3: Cross multiply
    128,446.56x = 177,257.52 × 77,461.92
  4. Step 4: Simplify right side
    128,446.56x = 13,730,707,833.64
  5. Step 5: Solve for x
    x = 13,730,707,833.64/128,446.56
  6. Step 6: Final answer
    x = 106,898.21

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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.