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Finding the Fourth Proportional to 108,729.44, 150,041.87 and 65,719.35

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Solution

The fourth proportional to 108,729.44, 150,041.87 and 65,719.35 is: 90,689.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,729.44 : 150,041.87 = 65,719.35 : x
  2. Step 2: Convert to fraction form
    108,729.44/150,041.87 = 65,719.35/x
  3. Step 3: Cross multiply
    108,729.44x = 150,041.87 × 65,719.35
  4. Step 4: Simplify right side
    108,729.44x = 9,860,654,087.04
  5. Step 5: Solve for x
    x = 9,860,654,087.04/108,729.44
  6. Step 6: Final answer
    x = 90,689.83

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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.