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Finding the Fourth Proportional to 173,818.30, 260,813.85 and 68,640.70

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Solution

The fourth proportional to 173,818.30, 260,813.85 and 68,640.70 is: 102,995.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,818.30 : 260,813.85 = 68,640.70 : x
  2. Step 2: Convert to fraction form
    173,818.30/260,813.85 = 68,640.70/x
  3. Step 3: Cross multiply
    173,818.30x = 260,813.85 × 68,640.70
  4. Step 4: Simplify right side
    173,818.30x = 17,902,445,233.70
  5. Step 5: Solve for x
    x = 17,902,445,233.70/173,818.30
  6. Step 6: Final answer
    x = 102,995.17

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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.