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Finding the Fourth Proportional to 61,869, 85,379.40 and 33,574.68

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Solution

The fourth proportional to 61,869, 85,379.40 and 33,574.68 is: 46,333.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,869 : 85,379.40 = 33,574.68 : x
  2. Step 2: Convert to fraction form
    61,869/85,379.40 = 33,574.68/x
  3. Step 3: Cross multiply
    61,869x = 85,379.40 × 33,574.68
  4. Step 4: Simplify right side
    61,869x = 2,866,586,033.59
  5. Step 5: Solve for x
    x = 2,866,586,033.59/61,869
  6. Step 6: Final answer
    x = 46,333.16

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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.