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Finding the Fourth Proportional to 172,386.60, 258,579.90 and 83,813.10

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Solution

The fourth proportional to 172,386.60, 258,579.90 and 83,813.10 is: 125,719.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,386.60 : 258,579.90 = 83,813.10 : x
  2. Step 2: Convert to fraction form
    172,386.60/258,579.90 = 83,813.10/x
  3. Step 3: Cross multiply
    172,386.60x = 258,579.90 × 83,813.10
  4. Step 4: Simplify right side
    172,386.60x = 21,672,383,016.69
  5. Step 5: Solve for x
    x = 21,672,383,016.69/172,386.60
  6. Step 6: Final answer
    x = 125,719.65

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Similar ratio
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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.