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Finding the Fourth Proportional to 139,065.19, 191,908.11 and 75,401.62

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Solution

The fourth proportional to 139,065.19, 191,908.11 and 75,401.62 is: 104,053.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,065.19 : 191,908.11 = 75,401.62 : x
  2. Step 2: Convert to fraction form
    139,065.19/191,908.11 = 75,401.62/x
  3. Step 3: Cross multiply
    139,065.19x = 191,908.11 × 75,401.62
  4. Step 4: Simplify right side
    139,065.19x = 14,470,182,385.14
  5. Step 5: Solve for x
    x = 14,470,182,385.14/139,065.19
  6. Step 6: Final answer
    x = 104,053.23

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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.