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Finding the Fourth Proportional to 61,720.38, 85,174.20 and 33,426

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Solution

The fourth proportional to 61,720.38, 85,174.20 and 33,426 is: 46,127.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,720.38 : 85,174.20 = 33,426 : x
  2. Step 2: Convert to fraction form
    61,720.38/85,174.20 = 33,426/x
  3. Step 3: Cross multiply
    61,720.38x = 85,174.20 × 33,426
  4. Step 4: Simplify right side
    61,720.38x = 2,847,032,809.20
  5. Step 5: Solve for x
    x = 2,847,032,809.20/61,720.38
  6. Step 6: Final answer
    x = 46,127.92

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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.