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Finding the Fourth Proportional to 118,147.11, 177,294.44 and 78,731.88

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Solution

The fourth proportional to 118,147.11, 177,294.44 and 78,731.88 is: 118,146.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,147.11 : 177,294.44 = 78,731.88 : x
  2. Step 2: Convert to fraction form
    118,147.11/177,294.44 = 78,731.88/x
  3. Step 3: Cross multiply
    118,147.11x = 177,294.44 × 78,731.88
  4. Step 4: Simplify right side
    118,147.11x = 13,958,724,574.75
  5. Step 5: Solve for x
    x = 13,958,724,574.75/118,147.11
  6. Step 6: Final answer
    x = 118,146.98

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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.