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Finding the Fourth Proportional to 99,163.88, 136,730.58 and 73,969.64

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Solution

The fourth proportional to 99,163.88, 136,730.58 and 73,969.64 is: 101,991.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,163.88 : 136,730.58 = 73,969.64 : x
  2. Step 2: Convert to fraction form
    99,163.88/136,730.58 = 73,969.64/x
  3. Step 3: Cross multiply
    99,163.88x = 136,730.58 × 73,969.64
  4. Step 4: Simplify right side
    99,163.88x = 10,113,911,779.59
  5. Step 5: Solve for x
    x = 10,113,911,779.59/99,163.88
  6. Step 6: Final answer
    x = 101,991.89

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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.