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Finding the Fourth Proportional to 160,396.65, 240,485.61 and 81,358.47

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Solution

The fourth proportional to 160,396.65, 240,485.61 and 81,358.47 is: 121,982.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,396.65 : 240,485.61 = 81,358.47 : x
  2. Step 2: Convert to fraction form
    160,396.65/240,485.61 = 81,358.47/x
  3. Step 3: Cross multiply
    160,396.65x = 240,485.61 × 81,358.47
  4. Step 4: Simplify right side
    160,396.65x = 19,565,541,286.62
  5. Step 5: Solve for x
    x = 19,565,541,286.62/160,396.65
  6. Step 6: Final answer
    x = 121,982.23

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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.