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Finding the Fourth Proportional to 61,379, 84,703.11 and 36,228.50

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Solution

The fourth proportional to 61,379, 84,703.11 and 36,228.50 is: 49,995.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,379 : 84,703.11 = 36,228.50 : x
  2. Step 2: Convert to fraction form
    61,379/84,703.11 = 36,228.50/x
  3. Step 3: Cross multiply
    61,379x = 84,703.11 × 36,228.50
  4. Step 4: Simplify right side
    61,379x = 3,068,666,620.64
  5. Step 5: Solve for x
    x = 3,068,666,620.64/61,379
  6. Step 6: Final answer
    x = 49,995.38

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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.