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Finding the Fourth Proportional to 85,922.56, 128,832.06 and 38,529.07

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Solution

The fourth proportional to 85,922.56, 128,832.06 and 38,529.07 is: 57,770.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,922.56 : 128,832.06 = 38,529.07 : x
  2. Step 2: Convert to fraction form
    85,922.56/128,832.06 = 38,529.07/x
  3. Step 3: Cross multiply
    85,922.56x = 128,832.06 × 38,529.07
  4. Step 4: Simplify right side
    85,922.56x = 4,963,779,457.98
  5. Step 5: Solve for x
    x = 4,963,779,457.98/85,922.56
  6. Step 6: Final answer
    x = 57,770.39

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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.