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Finding the Fourth Proportional to 121,814.58, 168,103.35 and 68,099.34

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Solution

The fourth proportional to 121,814.58, 168,103.35 and 68,099.34 is: 93,976.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,814.58 : 168,103.35 = 68,099.34 : x
  2. Step 2: Convert to fraction form
    121,814.58/168,103.35 = 68,099.34/x
  3. Step 3: Cross multiply
    121,814.58x = 168,103.35 × 68,099.34
  4. Step 4: Simplify right side
    121,814.58x = 11,447,727,186.79
  5. Step 5: Solve for x
    x = 11,447,727,186.79/121,814.58
  6. Step 6: Final answer
    x = 93,976.66

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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.