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Finding the Fourth Proportional to 110,908.60, 166,071.30 and 81,165.40

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Solution

The fourth proportional to 110,908.60, 166,071.30 and 81,165.40 is: 121,534.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,908.60 : 166,071.30 = 81,165.40 : x
  2. Step 2: Convert to fraction form
    110,908.60/166,071.30 = 81,165.40/x
  3. Step 3: Cross multiply
    110,908.60x = 166,071.30 × 81,165.40
  4. Step 4: Simplify right side
    110,908.60x = 13,479,243,493.02
  5. Step 5: Solve for x
    x = 13,479,243,493.02/110,908.60
  6. Step 6: Final answer
    x = 121,534.70

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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.