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Finding the Fourth Proportional to 121,756.05, 168,020.10 and 68,041.49

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Solution

The fourth proportional to 121,756.05, 168,020.10 and 68,041.49 is: 93,895.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,756.05 : 168,020.10 = 68,041.49 : x
  2. Step 2: Convert to fraction form
    121,756.05/168,020.10 = 68,041.49/x
  3. Step 3: Cross multiply
    121,756.05x = 168,020.10 × 68,041.49
  4. Step 4: Simplify right side
    121,756.05x = 11,432,337,113.85
  5. Step 5: Solve for x
    x = 11,432,337,113.85/121,756.05
  6. Step 6: Final answer
    x = 93,895.43

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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.