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Finding the Fourth Proportional to 117,635.56, 176,461.02 and 86,139.88

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Solution

The fourth proportional to 117,635.56, 176,461.02 and 86,139.88 is: 129,215.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,635.56 : 176,461.02 = 86,139.88 : x
  2. Step 2: Convert to fraction form
    117,635.56/176,461.02 = 86,139.88/x
  3. Step 3: Cross multiply
    117,635.56x = 176,461.02 × 86,139.88
  4. Step 4: Simplify right side
    117,635.56x = 15,200,331,087.48
  5. Step 5: Solve for x
    x = 15,200,331,087.48/117,635.56
  6. Step 6: Final answer
    x = 129,215.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.