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Finding the Fourth Proportional to 123,913.19, 170,994.62 and 70,197.11

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Solution

The fourth proportional to 123,913.19, 170,994.62 and 70,197.11 is: 96,868.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,913.19 : 170,994.62 = 70,197.11 : x
  2. Step 2: Convert to fraction form
    123,913.19/170,994.62 = 70,197.11/x
  3. Step 3: Cross multiply
    123,913.19x = 170,994.62 × 70,197.11
  4. Step 4: Simplify right side
    123,913.19x = 12,003,327,470.07
  5. Step 5: Solve for x
    x = 12,003,327,470.07/123,913.19
  6. Step 6: Final answer
    x = 96,868.85

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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.