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Finding the Fourth Proportional to 85,675.53, 118,218.15 and 53,821.89

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Solution

The fourth proportional to 85,675.53, 118,218.15 and 53,821.89 is: 74,265.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,675.53 : 118,218.15 = 53,821.89 : x
  2. Step 2: Convert to fraction form
    85,675.53/118,218.15 = 53,821.89/x
  3. Step 3: Cross multiply
    85,675.53x = 118,218.15 × 53,821.89
  4. Step 4: Simplify right side
    85,675.53x = 6,362,724,265.30
  5. Step 5: Solve for x
    x = 6,362,724,265.30/85,675.53
  6. Step 6: Final answer
    x = 74,265.36

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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.