Home / 128,654.67-192,985.79-109,815.92

Finding the Fourth Proportional to 128,654.67, 192,985.79 and 109,815.92

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Solution

The fourth proportional to 128,654.67, 192,985.79 and 109,815.92 is: 164,727.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,654.67 : 192,985.79 = 109,815.92 : x
  2. Step 2: Convert to fraction form
    128,654.67/192,985.79 = 109,815.92/x
  3. Step 3: Cross multiply
    128,654.67x = 192,985.79 × 109,815.92
  4. Step 4: Simplify right side
    128,654.67x = 21,192,910,561.77
  5. Step 5: Solve for x
    x = 21,192,910,561.77/128,654.67
  6. Step 6: Final answer
    x = 164,727.10

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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.