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Finding the Fourth Proportional to 140,641.93, 194,085.53 and 76,979.17

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Solution

The fourth proportional to 140,641.93, 194,085.53 and 76,979.17 is: 106,231.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,641.93 : 194,085.53 = 76,979.17 : x
  2. Step 2: Convert to fraction form
    140,641.93/194,085.53 = 76,979.17/x
  3. Step 3: Cross multiply
    140,641.93x = 194,085.53 × 76,979.17
  4. Step 4: Simplify right side
    140,641.93x = 14,940,543,008.41
  5. Step 5: Solve for x
    x = 14,940,543,008.41/140,641.93
  6. Step 6: Final answer
    x = 106,231.07

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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.