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Finding the Fourth Proportional to 188,503.47, 260,128.20 and 103,619.92

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Solution

The fourth proportional to 188,503.47, 260,128.20 and 103,619.92 is: 142,991.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,503.47 : 260,128.20 = 103,619.92 : x
  2. Step 2: Convert to fraction form
    188,503.47/260,128.20 = 103,619.92/x
  3. Step 3: Cross multiply
    188,503.47x = 260,128.20 × 103,619.92
  4. Step 4: Simplify right side
    188,503.47x = 26,954,463,273.74
  5. Step 5: Solve for x
    x = 26,954,463,273.74/188,503.47
  6. Step 6: Final answer
    x = 142,991.87

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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.