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Finding the Fourth Proportional to 239,706.40, 330,811.01 and 137,765.20

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Solution

The fourth proportional to 239,706.40, 330,811.01 and 137,765.20 is: 190,125.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,706.40 : 330,811.01 = 137,765.20 : x
  2. Step 2: Convert to fraction form
    239,706.40/330,811.01 = 137,765.20/x
  3. Step 3: Cross multiply
    239,706.40x = 330,811.01 × 137,765.20
  4. Step 4: Simplify right side
    239,706.40x = 45,574,244,954.85
  5. Step 5: Solve for x
    x = 45,574,244,954.85/239,706.40
  6. Step 6: Final answer
    x = 190,125.27

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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.