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Finding the Fourth Proportional to 211,419.76, 291,912.34 and 136,099.48

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Solution

The fourth proportional to 211,419.76, 291,912.34 and 136,099.48 is: 187,915.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,419.76 : 291,912.34 = 136,099.48 : x
  2. Step 2: Convert to fraction form
    211,419.76/291,912.34 = 136,099.48/x
  3. Step 3: Cross multiply
    211,419.76x = 291,912.34 × 136,099.48
  4. Step 4: Simplify right side
    211,419.76x = 39,729,117,679.58
  5. Step 5: Solve for x
    x = 39,729,117,679.58/211,419.76
  6. Step 6: Final answer
    x = 187,915.82

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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.