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Finding the Fourth Proportional to 86,702.64, 119,644.12 and 48,459.28

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Solution

The fourth proportional to 86,702.64, 119,644.12 and 48,459.28 is: 66,870.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,702.64 : 119,644.12 = 48,459.28 : x
  2. Step 2: Convert to fraction form
    86,702.64/119,644.12 = 48,459.28/x
  3. Step 3: Cross multiply
    86,702.64x = 119,644.12 × 48,459.28
  4. Step 4: Simplify right side
    86,702.64x = 5,797,867,911.43
  5. Step 5: Solve for x
    x = 5,797,867,911.43/86,702.64
  6. Step 6: Final answer
    x = 66,870.72

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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.