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Finding the Fourth Proportional to 118,474.80, 177,721.38 and 39,589.30

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Solution

The fourth proportional to 118,474.80, 177,721.38 and 39,589.30 is: 59,387.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,474.80 : 177,721.38 = 39,589.30 : x
  2. Step 2: Convert to fraction form
    118,474.80/177,721.38 = 39,589.30/x
  3. Step 3: Cross multiply
    118,474.80x = 177,721.38 × 39,589.30
  4. Step 4: Simplify right side
    118,474.80x = 7,035,865,029.23
  5. Step 5: Solve for x
    x = 7,035,865,029.23/118,474.80
  6. Step 6: Final answer
    x = 59,387.02

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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.