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Finding the Fourth Proportional to 61,895.63, 85,435.41 and 39,539.63

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Solution

The fourth proportional to 61,895.63, 85,435.41 and 39,539.63 is: 54,577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,895.63 : 85,435.41 = 39,539.63 : x
  2. Step 2: Convert to fraction form
    61,895.63/85,435.41 = 39,539.63/x
  3. Step 3: Cross multiply
    61,895.63x = 85,435.41 × 39,539.63
  4. Step 4: Simplify right side
    61,895.63x = 3,378,084,073.12
  5. Step 5: Solve for x
    x = 3,378,084,073.12/61,895.63
  6. Step 6: Final answer
    x = 54,577.11

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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.