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Finding the Fourth Proportional to 78,753.78, 108,699.57 and 60,821.46

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Solution

The fourth proportional to 78,753.78, 108,699.57 and 60,821.46 is: 83,948.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,753.78 : 108,699.57 = 60,821.46 : x
  2. Step 2: Convert to fraction form
    78,753.78/108,699.57 = 60,821.46/x
  3. Step 3: Cross multiply
    78,753.78x = 108,699.57 × 60,821.46
  4. Step 4: Simplify right side
    78,753.78x = 6,611,266,548.77
  5. Step 5: Solve for x
    x = 6,611,266,548.77/78,753.78
  6. Step 6: Final answer
    x = 83,948.56

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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.