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Finding the Fourth Proportional to 239,434.70, 359,200.65 and 81,679.10

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Solution

The fourth proportional to 239,434.70, 359,200.65 and 81,679.10 is: 122,535.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,434.70 : 359,200.65 = 81,679.10 : x
  2. Step 2: Convert to fraction form
    239,434.70/359,200.65 = 81,679.10/x
  3. Step 3: Cross multiply
    239,434.70x = 359,200.65 × 81,679.10
  4. Step 4: Simplify right side
    239,434.70x = 29,339,185,811.42
  5. Step 5: Solve for x
    x = 29,339,185,811.42/239,434.70
  6. Step 6: Final answer
    x = 122,535.23

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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.