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Finding the Fourth Proportional to 68,029, 101,787 and 61,122.76

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Solution

The fourth proportional to 68,029, 101,787 and 61,122.76 is: 91,453.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,029 : 101,787 = 61,122.76 : x
  2. Step 2: Convert to fraction form
    68,029/101,787 = 61,122.76/x
  3. Step 3: Cross multiply
    68,029x = 101,787 × 61,122.76
  4. Step 4: Simplify right side
    68,029x = 6,221,502,372.12
  5. Step 5: Solve for x
    x = 6,221,502,372.12/68,029
  6. Step 6: Final answer
    x = 91,453.68

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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.