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Finding the Fourth Proportional to 78,955.33, 108,956.57 and 43,145.56

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Solution

The fourth proportional to 78,955.33, 108,956.57 and 43,145.56 is: 59,539.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,955.33 : 108,956.57 = 43,145.56 : x
  2. Step 2: Convert to fraction form
    78,955.33/108,956.57 = 43,145.56/x
  3. Step 3: Cross multiply
    78,955.33x = 108,956.57 × 43,145.56
  4. Step 4: Simplify right side
    78,955.33x = 4,700,992,270.14
  5. Step 5: Solve for x
    x = 4,700,992,270.14/78,955.33
  6. Step 6: Final answer
    x = 59,539.90

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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.