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Finding the Fourth Proportional to 78,484.88, 108,308.32 and 58,431.44

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Solution

The fourth proportional to 78,484.88, 108,308.32 and 58,431.44 is: 80,634.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,484.88 : 108,308.32 = 58,431.44 : x
  2. Step 2: Convert to fraction form
    78,484.88/108,308.32 = 58,431.44/x
  3. Step 3: Cross multiply
    78,484.88x = 108,308.32 × 58,431.44
  4. Step 4: Simplify right side
    78,484.88x = 6,328,611,101.58
  5. Step 5: Solve for x
    x = 6,328,611,101.58/78,484.88
  6. Step 6: Final answer
    x = 80,634.78

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1.5x scale

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.