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Finding the Fourth Proportional to 109,953.52, 165,207.13 and 69,990.89

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Solution

The fourth proportional to 109,953.52, 165,207.13 and 69,990.89 is: 105,162.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,953.52 : 165,207.13 = 69,990.89 : x
  2. Step 2: Convert to fraction form
    109,953.52/165,207.13 = 69,990.89/x
  3. Step 3: Cross multiply
    109,953.52x = 165,207.13 × 69,990.89
  4. Step 4: Simplify right side
    109,953.52x = 11,562,993,062.03
  5. Step 5: Solve for x
    x = 11,562,993,062.03/109,953.52
  6. Step 6: Final answer
    x = 105,162.56

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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.