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Finding the Fourth Proportional to 252,431.28, 348,349.56 and 139,254

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Solution

The fourth proportional to 252,431.28, 348,349.56 and 139,254 is: 192,167.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,431.28 : 348,349.56 = 139,254 : x
  2. Step 2: Convert to fraction form
    252,431.28/348,349.56 = 139,254/x
  3. Step 3: Cross multiply
    252,431.28x = 348,349.56 × 139,254
  4. Step 4: Simplify right side
    252,431.28x = 48,509,069,628.24
  5. Step 5: Solve for x
    x = 48,509,069,628.24/252,431.28
  6. Step 6: Final answer
    x = 192,167.43

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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.