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Finding the Fourth Proportional to 66,328.98, 91,531.87 and 39,465.33

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Solution

The fourth proportional to 66,328.98, 91,531.87 and 39,465.33 is: 54,460.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,328.98 : 91,531.87 = 39,465.33 : x
  2. Step 2: Convert to fraction form
    66,328.98/91,531.87 = 39,465.33/x
  3. Step 3: Cross multiply
    66,328.98x = 91,531.87 × 39,465.33
  4. Step 4: Simplify right side
    66,328.98x = 3,612,335,235.15
  5. Step 5: Solve for x
    x = 3,612,335,235.15/66,328.98
  6. Step 6: Final answer
    x = 54,460.89

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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.