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Finding the Fourth Proportional to 78,651.77, 108,539.73 and 42,841.44

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Solution

The fourth proportional to 78,651.77, 108,539.73 and 42,841.44 is: 59,121.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,651.77 : 108,539.73 = 42,841.44 : x
  2. Step 2: Convert to fraction form
    78,651.77/108,539.73 = 42,841.44/x
  3. Step 3: Cross multiply
    78,651.77x = 108,539.73 × 42,841.44
  4. Step 4: Simplify right side
    78,651.77x = 4,649,998,330.41
  5. Step 5: Solve for x
    x = 4,649,998,330.41/78,651.77
  6. Step 6: Final answer
    x = 59,121.35

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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.