Home / 171,639.10-257,123.48-81,553.61

Finding the Fourth Proportional to 171,639.10, 257,123.48 and 81,553.61

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Solution

The fourth proportional to 171,639.10, 257,123.48 and 81,553.61 is: 122,171.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,639.10 : 257,123.48 = 81,553.61 : x
  2. Step 2: Convert to fraction form
    171,639.10/257,123.48 = 81,553.61/x
  3. Step 3: Cross multiply
    171,639.10x = 257,123.48 × 81,553.61
  4. Step 4: Simplify right side
    171,639.10x = 20,969,348,009.76
  5. Step 5: Solve for x
    x = 20,969,348,009.76/171,639.10
  6. Step 6: Final answer
    x = 122,171.16

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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.