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Finding the Fourth Proportional to 61,890.72, 85,402.56 and 35,028.96

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Solution

The fourth proportional to 61,890.72, 85,402.56 and 35,028.96 is: 48,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,890.72 : 85,402.56 = 35,028.96 : x
  2. Step 2: Convert to fraction form
    61,890.72/85,402.56 = 35,028.96/x
  3. Step 3: Cross multiply
    61,890.72x = 85,402.56 × 35,028.96
  4. Step 4: Simplify right side
    61,890.72x = 2,991,562,858.14
  5. Step 5: Solve for x
    x = 2,991,562,858.14/61,890.72
  6. Step 6: Final answer
    x = 48,336.21

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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.