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Finding the Fourth Proportional to 172,358.72, 258,530.56 and 54,027.36

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Solution

The fourth proportional to 172,358.72, 258,530.56 and 54,027.36 is: 81,038.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,358.72 : 258,530.56 = 54,027.36 : x
  2. Step 2: Convert to fraction form
    172,358.72/258,530.56 = 54,027.36/x
  3. Step 3: Cross multiply
    172,358.72x = 258,530.56 × 54,027.36
  4. Step 4: Simplify right side
    172,358.72x = 13,967,723,636.12
  5. Step 5: Solve for x
    x = 13,967,723,636.12/172,358.72
  6. Step 6: Final answer
    x = 81,038.68

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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.