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Finding the Fourth Proportional to 61,721.60, 85,174.80 and 33,427.04

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Solution

The fourth proportional to 61,721.60, 85,174.80 and 33,427.04 is: 46,128.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,721.60 : 85,174.80 = 33,427.04 : x
  2. Step 2: Convert to fraction form
    61,721.60/85,174.80 = 33,427.04/x
  3. Step 3: Cross multiply
    61,721.60x = 85,174.80 × 33,427.04
  4. Step 4: Simplify right side
    61,721.60x = 2,847,141,446.59
  5. Step 5: Solve for x
    x = 2,847,141,446.59/61,721.60
  6. Step 6: Final answer
    x = 46,128.77

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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.