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Finding the Fourth Proportional to 128,848.11, 193,064.39 and 69,711.63

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Solution

The fourth proportional to 128,848.11, 193,064.39 and 69,711.63 is: 104,455.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,848.11 : 193,064.39 = 69,711.63 : x
  2. Step 2: Convert to fraction form
    128,848.11/193,064.39 = 69,711.63/x
  3. Step 3: Cross multiply
    128,848.11x = 193,064.39 × 69,711.63
  4. Step 4: Simplify right side
    128,848.11x = 13,458,833,321.86
  5. Step 5: Solve for x
    x = 13,458,833,321.86/128,848.11
  6. Step 6: Final answer
    x = 104,455.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.