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Finding the Fourth Proportional to 239,140, 330,028.17 and 131,710

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Solution

The fourth proportional to 239,140, 330,028.17 and 131,710 is: 181,768.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,140 : 330,028.17 = 131,710 : x
  2. Step 2: Convert to fraction form
    239,140/330,028.17 = 131,710/x
  3. Step 3: Cross multiply
    239,140x = 330,028.17 × 131,710
  4. Step 4: Simplify right side
    239,140x = 43,468,010,270.70
  5. Step 5: Solve for x
    x = 43,468,010,270.70/239,140
  6. Step 6: Final answer
    x = 181,768.04

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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.