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Finding the Fourth Proportional to 65,996.64, 91,038.60 and 39,113.28

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Solution

The fourth proportional to 65,996.64, 91,038.60 and 39,113.28 is: 53,954.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,996.64 : 91,038.60 = 39,113.28 : x
  2. Step 2: Convert to fraction form
    65,996.64/91,038.60 = 39,113.28/x
  3. Step 3: Cross multiply
    65,996.64x = 91,038.60 × 39,113.28
  4. Step 4: Simplify right side
    65,996.64x = 3,560,818,252.61
  5. Step 5: Solve for x
    x = 3,560,818,252.61/65,996.64
  6. Step 6: Final answer
    x = 53,954.54

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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.