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Finding the Fourth Proportional to 61,720.79, 85,189.05 and 43,821.41

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Solution

The fourth proportional to 61,720.79, 85,189.05 and 43,821.41 is: 60,483.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,720.79 : 85,189.05 = 43,821.41 : x
  2. Step 2: Convert to fraction form
    61,720.79/85,189.05 = 43,821.41/x
  3. Step 3: Cross multiply
    61,720.79x = 85,189.05 × 43,821.41
  4. Step 4: Simplify right side
    61,720.79x = 3,733,103,861.62
  5. Step 5: Solve for x
    x = 3,733,103,861.62/61,720.79
  6. Step 6: Final answer
    x = 60,483.74

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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.