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Finding the Fourth Proportional to 180,640.02, 271,128.15 and 91,959.91

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Solution

The fourth proportional to 180,640.02, 271,128.15 and 91,959.91 is: 138,025.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,640.02 : 271,128.15 = 91,959.91 : x
  2. Step 2: Convert to fraction form
    180,640.02/271,128.15 = 91,959.91/x
  3. Step 3: Cross multiply
    180,640.02x = 271,128.15 × 91,959.91
  4. Step 4: Simplify right side
    180,640.02x = 24,932,919,812.67
  5. Step 5: Solve for x
    x = 24,932,919,812.67/180,640.02
  6. Step 6: Final answer
    x = 138,025.45

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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.