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Finding the Fourth Proportional to 116,695.72, 174,780.90 and 81,791.20

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Solution

The fourth proportional to 116,695.72, 174,780.90 and 81,791.20 is: 122,502.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,695.72 : 174,780.90 = 81,791.20 : x
  2. Step 2: Convert to fraction form
    116,695.72/174,780.90 = 81,791.20/x
  3. Step 3: Cross multiply
    116,695.72x = 174,780.90 × 81,791.20
  4. Step 4: Simplify right side
    116,695.72x = 14,295,539,548.08
  5. Step 5: Solve for x
    x = 14,295,539,548.08/116,695.72
  6. Step 6: Final answer
    x = 122,502.69

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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.