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Finding the Fourth Proportional to 138,852.86, 191,616.90 and 75,190.64

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Solution

The fourth proportional to 138,852.86, 191,616.90 and 75,190.64 is: 103,763.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,852.86 : 191,616.90 = 75,190.64 : x
  2. Step 2: Convert to fraction form
    138,852.86/191,616.90 = 75,190.64/x
  3. Step 3: Cross multiply
    138,852.86x = 191,616.90 × 75,190.64
  4. Step 4: Simplify right side
    138,852.86x = 14,407,797,345.82
  5. Step 5: Solve for x
    x = 14,407,797,345.82/138,852.86
  6. Step 6: Final answer
    x = 103,763.06

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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.