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Finding the Fourth Proportional to 61,720.59, 85,174.34 and 33,426.39

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Solution

The fourth proportional to 61,720.59, 85,174.34 and 33,426.39 is: 46,128.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,720.59 : 85,174.34 = 33,426.39 : x
  2. Step 2: Convert to fraction form
    61,720.59/85,174.34 = 33,426.39/x
  3. Step 3: Cross multiply
    61,720.59x = 85,174.34 × 33,426.39
  4. Step 4: Simplify right side
    61,720.59x = 2,847,070,539.70
  5. Step 5: Solve for x
    x = 2,847,070,539.70/61,720.59
  6. Step 6: Final answer
    x = 46,128.38

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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.