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Finding the Fourth Proportional to 69,992.04, 105,031.80 and 28,439.04

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Solution

The fourth proportional to 69,992.04, 105,031.80 and 28,439.04 is: 42,676.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,992.04 : 105,031.80 = 28,439.04 : x
  2. Step 2: Convert to fraction form
    69,992.04/105,031.80 = 28,439.04/x
  3. Step 3: Cross multiply
    69,992.04x = 105,031.80 × 28,439.04
  4. Step 4: Simplify right side
    69,992.04x = 2,987,003,561.47
  5. Step 5: Solve for x
    x = 2,987,003,561.47/69,992.04
  6. Step 6: Final answer
    x = 42,676.33

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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.