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Finding the Fourth Proportional to 219,925.80, 329,744.70 and 86,725.80

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Solution

The fourth proportional to 219,925.80, 329,744.70 and 86,725.80 is: 130,031.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,925.80 : 329,744.70 = 86,725.80 : x
  2. Step 2: Convert to fraction form
    219,925.80/329,744.70 = 86,725.80/x
  3. Step 3: Cross multiply
    219,925.80x = 329,744.70 × 86,725.80
  4. Step 4: Simplify right side
    219,925.80x = 28,597,372,903.26
  5. Step 5: Solve for x
    x = 28,597,372,903.26/219,925.80
  6. Step 6: Final answer
    x = 130,031.91

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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.