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Finding the Fourth Proportional to 78,958.52, 118,437.78 and 39,475.88

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Solution

The fourth proportional to 78,958.52, 118,437.78 and 39,475.88 is: 59,213.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,958.52 : 118,437.78 = 39,475.88 : x
  2. Step 2: Convert to fraction form
    78,958.52/118,437.78 = 39,475.88/x
  3. Step 3: Cross multiply
    78,958.52x = 118,437.78 × 39,475.88
  4. Step 4: Simplify right side
    78,958.52x = 4,675,435,590.75
  5. Step 5: Solve for x
    x = 4,675,435,590.75/78,958.52
  6. Step 6: Final answer
    x = 59,213.82

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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.