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Finding the Fourth Proportional to 219,931.28, 329,671.56 and 86,757.56

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Solution

The fourth proportional to 219,931.28, 329,671.56 and 86,757.56 is: 130,047.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,931.28 : 329,671.56 = 86,757.56 : x
  2. Step 2: Convert to fraction form
    219,931.28/329,671.56 = 86,757.56/x
  3. Step 3: Cross multiply
    219,931.28x = 329,671.56 × 86,757.56
  4. Step 4: Simplify right side
    219,931.28x = 28,601,500,146.99
  5. Step 5: Solve for x
    x = 28,601,500,146.99/219,931.28
  6. Step 6: Final answer
    x = 130,047.44

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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.