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Finding the Fourth Proportional to 121,099.40, 181,649.10 and 68,611.40

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Solution

The fourth proportional to 121,099.40, 181,649.10 and 68,611.40 is: 102,917.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,099.40 : 181,649.10 = 68,611.40 : x
  2. Step 2: Convert to fraction form
    121,099.40/181,649.10 = 68,611.40/x
  3. Step 3: Cross multiply
    121,099.40x = 181,649.10 × 68,611.40
  4. Step 4: Simplify right side
    121,099.40x = 12,463,199,059.74
  5. Step 5: Solve for x
    x = 12,463,199,059.74/121,099.40
  6. Step 6: Final answer
    x = 102,917.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.