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Finding the Fourth Proportional to 139,910.25, 193,070.51 and 76,246.68

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Solution

The fourth proportional to 139,910.25, 193,070.51 and 76,246.68 is: 105,217.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,910.25 : 193,070.51 = 76,246.68 : x
  2. Step 2: Convert to fraction form
    139,910.25/193,070.51 = 76,246.68/x
  3. Step 3: Cross multiply
    139,910.25x = 193,070.51 × 76,246.68
  4. Step 4: Simplify right side
    139,910.25x = 14,720,985,393.41
  5. Step 5: Solve for x
    x = 14,720,985,393.41/139,910.25
  6. Step 6: Final answer
    x = 105,217.35

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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.