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Finding the Fourth Proportional to 61,642, 85,240.92 and 58,857.22

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Solution

The fourth proportional to 61,642, 85,240.92 and 58,857.22 is: 81,390.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,642 : 85,240.92 = 58,857.22 : x
  2. Step 2: Convert to fraction form
    61,642/85,240.92 = 58,857.22/x
  3. Step 3: Cross multiply
    61,642x = 85,240.92 × 58,857.22
  4. Step 4: Simplify right side
    61,642x = 5,017,043,581.44
  5. Step 5: Solve for x
    x = 5,017,043,581.44/61,642
  6. Step 6: Final answer
    x = 81,390.02

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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.