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Finding the Fourth Proportional to 136,698.78, 188,762.98 and 85,799.72

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Solution

The fourth proportional to 136,698.78, 188,762.98 and 85,799.72 is: 118,478.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,698.78 : 188,762.98 = 85,799.72 : x
  2. Step 2: Convert to fraction form
    136,698.78/188,762.98 = 85,799.72/x
  3. Step 3: Cross multiply
    136,698.78x = 188,762.98 × 85,799.72
  4. Step 4: Simplify right side
    136,698.78x = 16,195,810,830.37
  5. Step 5: Solve for x
    x = 16,195,810,830.37/136,698.78
  6. Step 6: Final answer
    x = 118,478.09

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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.