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Finding the Fourth Proportional to 116,672.72, 174,746.40 and 81,768.20

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Solution

The fourth proportional to 116,672.72, 174,746.40 and 81,768.20 is: 122,468.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,672.72 : 174,746.40 = 81,768.20 : x
  2. Step 2: Convert to fraction form
    116,672.72/174,746.40 = 81,768.20/x
  3. Step 3: Cross multiply
    116,672.72x = 174,746.40 × 81,768.20
  4. Step 4: Simplify right side
    116,672.72x = 14,288,698,584.48
  5. Step 5: Solve for x
    x = 14,288,698,584.48/116,672.72
  6. Step 6: Final answer
    x = 122,468.20

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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.