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Finding the Fourth Proportional to 99,189.56, 136,897.44 and 65,137.88

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Solution

The fourth proportional to 99,189.56, 136,897.44 and 65,137.88 is: 89,900.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,189.56 : 136,897.44 = 65,137.88 : x
  2. Step 2: Convert to fraction form
    99,189.56/136,897.44 = 65,137.88/x
  3. Step 3: Cross multiply
    99,189.56x = 136,897.44 × 65,137.88
  4. Step 4: Simplify right side
    99,189.56x = 8,917,209,019.03
  5. Step 5: Solve for x
    x = 8,917,209,019.03/99,189.56
  6. Step 6: Final answer
    x = 89,900.68

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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.