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Finding the Fourth Proportional to 78,366.83, 117,489.96 and 38,893.32

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Solution

The fourth proportional to 78,366.83, 117,489.96 and 38,893.32 is: 58,310.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,366.83 : 117,489.96 = 38,893.32 : x
  2. Step 2: Convert to fraction form
    78,366.83/117,489.96 = 38,893.32/x
  3. Step 3: Cross multiply
    78,366.83x = 117,489.96 × 38,893.32
  4. Step 4: Simplify right side
    78,366.83x = 4,569,574,611.07
  5. Step 5: Solve for x
    x = 4,569,574,611.07/78,366.83
  6. Step 6: Final answer
    x = 58,310.06

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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.