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Finding the Fourth Proportional to 78,703.52, 108,610.94 and 42,893.56

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Solution

The fourth proportional to 78,703.52, 108,610.94 and 42,893.56 is: 59,193.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,703.52 : 108,610.94 = 42,893.56 : x
  2. Step 2: Convert to fraction form
    78,703.52/108,610.94 = 42,893.56/x
  3. Step 3: Cross multiply
    78,703.52x = 108,610.94 × 42,893.56
  4. Step 4: Simplify right side
    78,703.52x = 4,658,709,871.55
  5. Step 5: Solve for x
    x = 4,658,709,871.55/78,703.52
  6. Step 6: Final answer
    x = 59,193.16

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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.