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Finding the Fourth Proportional to 113,679.84, 156,820.44 and 86,775.60

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Solution

The fourth proportional to 113,679.84, 156,820.44 and 86,775.60 is: 119,706.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,679.84 : 156,820.44 = 86,775.60 : x
  2. Step 2: Convert to fraction form
    113,679.84/156,820.44 = 86,775.60/x
  3. Step 3: Cross multiply
    113,679.84x = 156,820.44 × 86,775.60
  4. Step 4: Simplify right side
    113,679.84x = 13,608,187,773.26
  5. Step 5: Solve for x
    x = 13,608,187,773.26/113,679.84
  6. Step 6: Final answer
    x = 119,706.25

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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.