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Finding the Fourth Proportional to 239,892.48, 330,998.40 and 137,911.68

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Solution

The fourth proportional to 239,892.48, 330,998.40 and 137,911.68 is: 190,287.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,892.48 : 330,998.40 = 137,911.68 : x
  2. Step 2: Convert to fraction form
    239,892.48/330,998.40 = 137,911.68/x
  3. Step 3: Cross multiply
    239,892.48x = 330,998.40 × 137,911.68
  4. Step 4: Simplify right side
    239,892.48x = 45,648,545,421.31
  5. Step 5: Solve for x
    x = 45,648,545,421.31/239,892.48
  6. Step 6: Final answer
    x = 190,287.52

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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.