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Finding the Fourth Proportional to 172,870, 259,348.76 and 48,211

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Solution

The fourth proportional to 172,870, 259,348.76 and 48,211 is: 72,328.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,870 : 259,348.76 = 48,211 : x
  2. Step 2: Convert to fraction form
    172,870/259,348.76 = 48,211/x
  3. Step 3: Cross multiply
    172,870x = 259,348.76 × 48,211
  4. Step 4: Simplify right side
    172,870x = 12,503,463,068.36
  5. Step 5: Solve for x
    x = 12,503,463,068.36/172,870
  6. Step 6: Final answer
    x = 72,328.70

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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.