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Finding the Fourth Proportional to 66,461.21, 91,721.91 and 37,789.88

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Solution

The fourth proportional to 66,461.21, 91,721.91 and 37,789.88 is: 52,153.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.21 : 91,721.91 = 37,789.88 : x
  2. Step 2: Convert to fraction form
    66,461.21/91,721.91 = 37,789.88/x
  3. Step 3: Cross multiply
    66,461.21x = 91,721.91 × 37,789.88
  4. Step 4: Simplify right side
    66,461.21x = 3,466,159,513.66
  5. Step 5: Solve for x
    x = 3,466,159,513.66/66,461.21
  6. Step 6: Final answer
    x = 52,153.12

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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.