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Finding the Fourth Proportional to 78,958.56, 118,437.76 and 39,475.92

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Solution

The fourth proportional to 78,958.56, 118,437.76 and 39,475.92 is: 59,213.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,958.56 : 118,437.76 = 39,475.92 : x
  2. Step 2: Convert to fraction form
    78,958.56/118,437.76 = 39,475.92/x
  3. Step 3: Cross multiply
    78,958.56x = 118,437.76 × 39,475.92
  4. Step 4: Simplify right side
    78,958.56x = 4,675,439,538.74
  5. Step 5: Solve for x
    x = 4,675,439,538.74/78,958.56
  6. Step 6: Final answer
    x = 59,213.84

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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.