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Finding the Fourth Proportional to 128,127.66, 176,827.11 and 71,549.97

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Solution

The fourth proportional to 128,127.66, 176,827.11 and 71,549.97 is: 98,745.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,127.66 : 176,827.11 = 71,549.97 : x
  2. Step 2: Convert to fraction form
    128,127.66/176,827.11 = 71,549.97/x
  3. Step 3: Cross multiply
    128,127.66x = 176,827.11 × 71,549.97
  4. Step 4: Simplify right side
    128,127.66x = 12,651,973,484.27
  5. Step 5: Solve for x
    x = 12,651,973,484.27/128,127.66
  6. Step 6: Final answer
    x = 98,745.06

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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.