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Finding the Fourth Proportional to 188,492.90, 260,121.06 and 103,615.43

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Solution

The fourth proportional to 188,492.90, 260,121.06 and 103,615.43 is: 142,989.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,492.90 : 260,121.06 = 103,615.43 : x
  2. Step 2: Convert to fraction form
    188,492.90/260,121.06 = 103,615.43/x
  3. Step 3: Cross multiply
    188,492.90x = 260,121.06 × 103,615.43
  4. Step 4: Simplify right side
    188,492.90x = 26,952,554,183.35
  5. Step 5: Solve for x
    x = 26,952,554,183.35/188,492.90
  6. Step 6: Final answer
    x = 142,989.76

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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.