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Finding the Fourth Proportional to 86,171.70, 129,261.60 and 27,009.30

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Solution

The fourth proportional to 86,171.70, 129,261.60 and 27,009.30 is: 40,515.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,171.70 : 129,261.60 = 27,009.30 : x
  2. Step 2: Convert to fraction form
    86,171.70/129,261.60 = 27,009.30/x
  3. Step 3: Cross multiply
    86,171.70x = 129,261.60 × 27,009.30
  4. Step 4: Simplify right side
    86,171.70x = 3,491,265,332.88
  5. Step 5: Solve for x
    x = 3,491,265,332.88/86,171.70
  6. Step 6: Final answer
    x = 40,515.22

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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.