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Finding the Fourth Proportional to 239,010.50, 329,850.24 and 138,408.50

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Solution

The fourth proportional to 239,010.50, 329,850.24 and 138,408.50 is: 191,012.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,010.50 : 329,850.24 = 138,408.50 : x
  2. Step 2: Convert to fraction form
    239,010.50/329,850.24 = 138,408.50/x
  3. Step 3: Cross multiply
    239,010.50x = 329,850.24 × 138,408.50
  4. Step 4: Simplify right side
    239,010.50x = 45,654,076,943.04
  5. Step 5: Solve for x
    x = 45,654,076,943.04/239,010.50
  6. Step 6: Final answer
    x = 191,012.85

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1.5x scale

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.