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Finding the Fourth Proportional to 99,231.30, 136,936.04 and 56,788.92

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Solution

The fourth proportional to 99,231.30, 136,936.04 and 56,788.92 is: 78,366.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,231.30 : 136,936.04 = 56,788.92 : x
  2. Step 2: Convert to fraction form
    99,231.30/136,936.04 = 56,788.92/x
  3. Step 3: Cross multiply
    99,231.30x = 136,936.04 × 56,788.92
  4. Step 4: Simplify right side
    99,231.30x = 7,776,449,536.73
  5. Step 5: Solve for x
    x = 7,776,449,536.73/99,231.30
  6. Step 6: Final answer
    x = 78,366.90

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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.