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Finding the Fourth Proportional to 188,496.72, 260,121.78 and 103,615.20

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Solution

The fourth proportional to 188,496.72, 260,121.78 and 103,615.20 is: 142,986.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,496.72 : 260,121.78 = 103,615.20 : x
  2. Step 2: Convert to fraction form
    188,496.72/260,121.78 = 103,615.20/x
  3. Step 3: Cross multiply
    188,496.72x = 260,121.78 × 103,615.20
  4. Step 4: Simplify right side
    188,496.72x = 26,952,570,259.06
  5. Step 5: Solve for x
    x = 26,952,570,259.06/188,496.72
  6. Step 6: Final answer
    x = 142,986.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.