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Finding the Fourth Proportional to 65,000.32, 89,702.08 and 39,863.68

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Solution

The fourth proportional to 65,000.32, 89,702.08 and 39,863.68 is: 55,012.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,000.32 : 89,702.08 = 39,863.68 : x
  2. Step 2: Convert to fraction form
    65,000.32/89,702.08 = 39,863.68/x
  3. Step 3: Cross multiply
    65,000.32x = 89,702.08 × 39,863.68
  4. Step 4: Simplify right side
    65,000.32x = 3,575,855,012.45
  5. Step 5: Solve for x
    x = 3,575,855,012.45/65,000.32
  6. Step 6: Final answer
    x = 55,012.88

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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.