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Finding the Fourth Proportional to 56,696.78, 84,985.83 and 21,143.79

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Solution

The fourth proportional to 56,696.78, 84,985.83 and 21,143.79 is: 31,693.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,696.78 : 84,985.83 = 21,143.79 : x
  2. Step 2: Convert to fraction form
    56,696.78/84,985.83 = 21,143.79/x
  3. Step 3: Cross multiply
    56,696.78x = 84,985.83 × 21,143.79
  4. Step 4: Simplify right side
    56,696.78x = 1,796,922,861.19
  5. Step 5: Solve for x
    x = 1,796,922,861.19/56,696.78
  6. Step 6: Final answer
    x = 31,693.56

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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.