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Finding the Fourth Proportional to 78,494.61, 117,725.45 and 25,891.77

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Solution

The fourth proportional to 78,494.61, 117,725.45 and 25,891.77 is: 38,832.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,494.61 : 117,725.45 = 25,891.77 : x
  2. Step 2: Convert to fraction form
    78,494.61/117,725.45 = 25,891.77/x
  3. Step 3: Cross multiply
    78,494.61x = 117,725.45 × 25,891.77
  4. Step 4: Simplify right side
    78,494.61x = 3,048,120,274.55
  5. Step 5: Solve for x
    x = 3,048,120,274.55/78,494.61
  6. Step 6: Final answer
    x = 38,832.22

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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.