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Finding the Fourth Proportional to 129,645.60, 178,911.04 and 70,029.60

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Solution

The fourth proportional to 129,645.60, 178,911.04 and 70,029.60 is: 96,640.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,645.60 : 178,911.04 = 70,029.60 : x
  2. Step 2: Convert to fraction form
    129,645.60/178,911.04 = 70,029.60/x
  3. Step 3: Cross multiply
    129,645.60x = 178,911.04 × 70,029.60
  4. Step 4: Simplify right side
    129,645.60x = 12,529,068,566.78
  5. Step 5: Solve for x
    x = 12,529,068,566.78/129,645.60
  6. Step 6: Final answer
    x = 96,640.91

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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.