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Finding the Fourth Proportional to 239,881.77, 331,056.32 and 137,940.37

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Solution

The fourth proportional to 239,881.77, 331,056.32 and 137,940.37 is: 190,368.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,881.77 : 331,056.32 = 137,940.37 : x
  2. Step 2: Convert to fraction form
    239,881.77/331,056.32 = 137,940.37/x
  3. Step 3: Cross multiply
    239,881.77x = 331,056.32 × 137,940.37
  4. Step 4: Simplify right side
    239,881.77x = 45,666,031,616.49
  5. Step 5: Solve for x
    x = 45,666,031,616.49/239,881.77
  6. Step 6: Final answer
    x = 190,368.91

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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.