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Finding the Fourth Proportional to 140,391.90, 193,733.57 and 76,717.40

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Solution

The fourth proportional to 140,391.90, 193,733.57 and 76,717.40 is: 105,866.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,391.90 : 193,733.57 = 76,717.40 : x
  2. Step 2: Convert to fraction form
    140,391.90/193,733.57 = 76,717.40/x
  3. Step 3: Cross multiply
    140,391.90x = 193,733.57 × 76,717.40
  4. Step 4: Simplify right side
    140,391.90x = 14,862,735,006.24
  5. Step 5: Solve for x
    x = 14,862,735,006.24/140,391.90
  6. Step 6: Final answer
    x = 105,866.04

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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.