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Finding the Fourth Proportional to 66,461.21, 91,712.82 and 37,776.88

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Solution

The fourth proportional to 66,461.21, 91,712.82 and 37,776.88 is: 52,130.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.21 : 91,712.82 = 37,776.88 : x
  2. Step 2: Convert to fraction form
    66,461.21/91,712.82 = 37,776.88/x
  3. Step 3: Cross multiply
    66,461.21x = 91,712.82 × 37,776.88
  4. Step 4: Simplify right side
    66,461.21x = 3,464,624,195.60
  5. Step 5: Solve for x
    x = 3,464,624,195.60/66,461.21
  6. Step 6: Final answer
    x = 52,130.02

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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.