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Finding the Fourth Proportional to 125,285.54, 172,895.73 and 68,696.78

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Solution

The fourth proportional to 125,285.54, 172,895.73 and 68,696.78 is: 94,802.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,285.54 : 172,895.73 = 68,696.78 : x
  2. Step 2: Convert to fraction form
    125,285.54/172,895.73 = 68,696.78/x
  3. Step 3: Cross multiply
    125,285.54x = 172,895.73 × 68,696.78
  4. Step 4: Simplify right side
    125,285.54x = 11,877,379,926.75
  5. Step 5: Solve for x
    x = 11,877,379,926.75/125,285.54
  6. Step 6: Final answer
    x = 94,802.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.