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Finding the Fourth Proportional to 129,649.19, 178,915.89 and 70,033.19

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Solution

The fourth proportional to 129,649.19, 178,915.89 and 70,033.19 is: 96,645.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,649.19 : 178,915.89 = 70,033.19 : x
  2. Step 2: Convert to fraction form
    129,649.19/178,915.89 = 70,033.19/x
  3. Step 3: Cross multiply
    129,649.19x = 178,915.89 × 70,033.19
  4. Step 4: Simplify right side
    129,649.19x = 12,530,050,518.39
  5. Step 5: Solve for x
    x = 12,530,050,518.39/129,649.19
  6. Step 6: Final answer
    x = 96,645.81

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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.