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Finding the Fourth Proportional to 128,036.72, 176,766.36 and 92,318.96

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Solution

The fourth proportional to 128,036.72, 176,766.36 and 92,318.96 is: 127,454.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,036.72 : 176,766.36 = 92,318.96 : x
  2. Step 2: Convert to fraction form
    128,036.72/176,766.36 = 92,318.96/x
  3. Step 3: Cross multiply
    128,036.72x = 176,766.36 × 92,318.96
  4. Step 4: Simplify right side
    128,036.72x = 16,318,886,518.19
  5. Step 5: Solve for x
    x = 16,318,886,518.19/128,036.72
  6. Step 6: Final answer
    x = 127,454.74

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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.