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Finding the Fourth Proportional to 78,703.56, 108,609.48 and 42,893.88

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Solution

The fourth proportional to 78,703.56, 108,609.48 and 42,893.88 is: 59,192.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,703.56 : 108,609.48 = 42,893.88 : x
  2. Step 2: Convert to fraction form
    78,703.56/108,609.48 = 42,893.88/x
  3. Step 3: Cross multiply
    78,703.56x = 108,609.48 × 42,893.88
  4. Step 4: Simplify right side
    78,703.56x = 4,658,682,001.98
  5. Step 5: Solve for x
    x = 4,658,682,001.98/78,703.56
  6. Step 6: Final answer
    x = 59,192.77

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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.