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Finding the Fourth Proportional to 149,011.94, 205,638.51 and 85,349.69

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Solution

The fourth proportional to 149,011.94, 205,638.51 and 85,349.69 is: 117,783.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,011.94 : 205,638.51 = 85,349.69 : x
  2. Step 2: Convert to fraction form
    149,011.94/205,638.51 = 85,349.69/x
  3. Step 3: Cross multiply
    149,011.94x = 205,638.51 × 85,349.69
  4. Step 4: Simplify right side
    149,011.94x = 17,551,183,080.56
  5. Step 5: Solve for x
    x = 17,551,183,080.56/149,011.94
  6. Step 6: Final answer
    x = 117,783.74

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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.