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Finding the Fourth Proportional to 165,725.70, 248,674.95 and 72,240.90

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Solution

The fourth proportional to 165,725.70, 248,674.95 and 72,240.90 is: 108,399.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,725.70 : 248,674.95 = 72,240.90 : x
  2. Step 2: Convert to fraction form
    165,725.70/248,674.95 = 72,240.90/x
  3. Step 3: Cross multiply
    165,725.70x = 248,674.95 × 72,240.90
  4. Step 4: Simplify right side
    165,725.70x = 17,964,502,195.46
  5. Step 5: Solve for x
    x = 17,964,502,195.46/165,725.70
  6. Step 6: Final answer
    x = 108,399.01

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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.