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Finding the Fourth Proportional to 169,688.90, 254,588.71 and 80,930.87

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Solution

The fourth proportional to 169,688.90, 254,588.71 and 80,930.87 is: 121,422.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,688.90 : 254,588.71 = 80,930.87 : x
  2. Step 2: Convert to fraction form
    169,688.90/254,588.71 = 80,930.87/x
  3. Step 3: Cross multiply
    169,688.90x = 254,588.71 × 80,930.87
  4. Step 4: Simplify right side
    169,688.90x = 20,604,085,792.48
  5. Step 5: Solve for x
    x = 20,604,085,792.48/169,688.90
  6. Step 6: Final answer
    x = 121,422.71

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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.