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Finding the Fourth Proportional to 110,731.70, 166,097.55 and 81,207.20

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Solution

The fourth proportional to 110,731.70, 166,097.55 and 81,207.20 is: 121,810.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,731.70 : 166,097.55 = 81,207.20 : x
  2. Step 2: Convert to fraction form
    110,731.70/166,097.55 = 81,207.20/x
  3. Step 3: Cross multiply
    110,731.70x = 166,097.55 × 81,207.20
  4. Step 4: Simplify right side
    110,731.70x = 13,488,316,962.36
  5. Step 5: Solve for x
    x = 13,488,316,962.36/110,731.70
  6. Step 6: Final answer
    x = 121,810.80

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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.