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Finding the Fourth Proportional to 172,920.40, 259,358.73 and 54,603.70

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Solution

The fourth proportional to 172,920.40, 259,358.73 and 54,603.70 is: 81,898.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,920.40 : 259,358.73 = 54,603.70 : x
  2. Step 2: Convert to fraction form
    172,920.40/259,358.73 = 54,603.70/x
  3. Step 3: Cross multiply
    172,920.40x = 259,358.73 × 54,603.70
  4. Step 4: Simplify right side
    172,920.40x = 14,161,946,285.30
  5. Step 5: Solve for x
    x = 14,161,946,285.30/172,920.40
  6. Step 6: Final answer
    x = 81,898.64

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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.