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Finding the Fourth Proportional to 78,956.58, 108,955.44 and 43,146.86

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Solution

The fourth proportional to 78,956.58, 108,955.44 and 43,146.86 is: 59,540.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,956.58 : 108,955.44 = 43,146.86 : x
  2. Step 2: Convert to fraction form
    78,956.58/108,955.44 = 43,146.86/x
  3. Step 3: Cross multiply
    78,956.58x = 108,955.44 × 43,146.86
  4. Step 4: Simplify right side
    78,956.58x = 4,701,085,115.92
  5. Step 5: Solve for x
    x = 4,701,085,115.92/78,956.58
  6. Step 6: Final answer
    x = 59,540.13

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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.