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Finding the Fourth Proportional to 71,729.60, 107,464.80 and 43,995.20

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Solution

The fourth proportional to 71,729.60, 107,464.80 and 43,995.20 is: 65,913.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,729.60 : 107,464.80 = 43,995.20 : x
  2. Step 2: Convert to fraction form
    71,729.60/107,464.80 = 43,995.20/x
  3. Step 3: Cross multiply
    71,729.60x = 107,464.80 × 43,995.20
  4. Step 4: Simplify right side
    71,729.60x = 4,727,935,368.96
  5. Step 5: Solve for x
    x = 4,727,935,368.96/71,729.60
  6. Step 6: Final answer
    x = 65,913.31

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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.