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Finding the Fourth Proportional to 239,142, 330,030.93 and 131,712

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Solution

The fourth proportional to 239,142, 330,030.93 and 131,712 is: 181,770.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,142 : 330,030.93 = 131,712 : x
  2. Step 2: Convert to fraction form
    239,142/330,030.93 = 131,712/x
  3. Step 3: Cross multiply
    239,142x = 330,030.93 × 131,712
  4. Step 4: Simplify right side
    239,142x = 43,469,033,852.16
  5. Step 5: Solve for x
    x = 43,469,033,852.16/239,142
  6. Step 6: Final answer
    x = 181,770.81

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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.