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Finding the Fourth Proportional to 61,869, 85,379.28 and 33,574.69

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Solution

The fourth proportional to 61,869, 85,379.28 and 33,574.69 is: 46,333.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,869 : 85,379.28 = 33,574.69 : x
  2. Step 2: Convert to fraction form
    61,869/85,379.28 = 33,574.69/x
  3. Step 3: Cross multiply
    61,869x = 85,379.28 × 33,574.69
  4. Step 4: Simplify right side
    61,869x = 2,866,582,858.42
  5. Step 5: Solve for x
    x = 2,866,582,858.42/61,869
  6. Step 6: Final answer
    x = 46,333.10

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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.