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Finding the Fourth Proportional to 85,153.88, 127,746.32 and 28,991.11

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Solution

The fourth proportional to 85,153.88, 127,746.32 and 28,991.11 is: 43,491.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,153.88 : 127,746.32 = 28,991.11 : x
  2. Step 2: Convert to fraction form
    85,153.88/127,746.32 = 28,991.11/x
  3. Step 3: Cross multiply
    85,153.88x = 127,746.32 × 28,991.11
  4. Step 4: Simplify right side
    85,153.88x = 3,703,507,615.22
  5. Step 5: Solve for x
    x = 3,703,507,615.22/85,153.88
  6. Step 6: Final answer
    x = 43,491.94

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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.