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Finding the Fourth Proportional to 169,938.54, 254,520.05 and 81,254.77

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Solution

The fourth proportional to 169,938.54, 254,520.05 and 81,254.77 is: 121,696.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,938.54 : 254,520.05 = 81,254.77 : x
  2. Step 2: Convert to fraction form
    169,938.54/254,520.05 = 81,254.77/x
  3. Step 3: Cross multiply
    169,938.54x = 254,520.05 × 81,254.77
  4. Step 4: Simplify right side
    169,938.54x = 20,680,967,080.56
  5. Step 5: Solve for x
    x = 20,680,967,080.56/169,938.54
  6. Step 6: Final answer
    x = 121,696.74

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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.