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Finding the Fourth Proportional to 86,964.40, 130,489.80 and 34,375.60

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Solution

The fourth proportional to 86,964.40, 130,489.80 and 34,375.60 is: 51,580.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,964.40 : 130,489.80 = 34,375.60 : x
  2. Step 2: Convert to fraction form
    86,964.40/130,489.80 = 34,375.60/x
  3. Step 3: Cross multiply
    86,964.40x = 130,489.80 × 34,375.60
  4. Step 4: Simplify right side
    86,964.40x = 4,485,665,168.88
  5. Step 5: Solve for x
    x = 4,485,665,168.88/86,964.40
  6. Step 6: Final answer
    x = 51,580.48

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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.