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Finding the Fourth Proportional to 252,128, 347,943.84 and 138,958.04

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Solution

The fourth proportional to 252,128, 347,943.84 and 138,958.04 is: 191,766.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,128 : 347,943.84 = 138,958.04 : x
  2. Step 2: Convert to fraction form
    252,128/347,943.84 = 138,958.04/x
  3. Step 3: Cross multiply
    252,128x = 347,943.84 × 138,958.04
  4. Step 4: Simplify right side
    252,128x = 48,349,594,036.47
  5. Step 5: Solve for x
    x = 48,349,594,036.47/252,128
  6. Step 6: Final answer
    x = 191,766.06

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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.