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Finding the Fourth Proportional to 61,735.50, 85,214.43 and 39,379.50

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Solution

The fourth proportional to 61,735.50, 85,214.43 and 39,379.50 is: 54,356.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,735.50 : 85,214.43 = 39,379.50 : x
  2. Step 2: Convert to fraction form
    61,735.50/85,214.43 = 39,379.50/x
  3. Step 3: Cross multiply
    61,735.50x = 85,214.43 × 39,379.50
  4. Step 4: Simplify right side
    61,735.50x = 3,355,701,646.19
  5. Step 5: Solve for x
    x = 3,355,701,646.19/61,735.50
  6. Step 6: Final answer
    x = 54,356.11

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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.