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Finding the Fourth Proportional to 172,590.27, 258,920.70 and 72,750.48

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Solution

The fourth proportional to 172,590.27, 258,920.70 and 72,750.48 is: 109,140.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,590.27 : 258,920.70 = 72,750.48 : x
  2. Step 2: Convert to fraction form
    172,590.27/258,920.70 = 72,750.48/x
  3. Step 3: Cross multiply
    172,590.27x = 258,920.70 × 72,750.48
  4. Step 4: Simplify right side
    172,590.27x = 18,836,605,206.94
  5. Step 5: Solve for x
    x = 18,836,605,206.94/172,590.27
  6. Step 6: Final answer
    x = 109,140.60

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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.