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Finding the Fourth Proportional to 239,385.31, 359,130.48 and 70,918.80

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Solution

The fourth proportional to 239,385.31, 359,130.48 and 70,918.80 is: 106,393.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,385.31 : 359,130.48 = 70,918.80 : x
  2. Step 2: Convert to fraction form
    239,385.31/359,130.48 = 70,918.80/x
  3. Step 3: Cross multiply
    239,385.31x = 359,130.48 × 70,918.80
  4. Step 4: Simplify right side
    239,385.31x = 25,469,102,082.39
  5. Step 5: Solve for x
    x = 25,469,102,082.39/239,385.31
  6. Step 6: Final answer
    x = 106,393.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.