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Finding the Fourth Proportional to 219,300.30, 329,080.05 and 79,040.70

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Solution

The fourth proportional to 219,300.30, 329,080.05 and 79,040.70 is: 118,607.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,300.30 : 329,080.05 = 79,040.70 : x
  2. Step 2: Convert to fraction form
    219,300.30/329,080.05 = 79,040.70/x
  3. Step 3: Cross multiply
    219,300.30x = 329,080.05 × 79,040.70
  4. Step 4: Simplify right side
    219,300.30x = 26,010,717,508.04
  5. Step 5: Solve for x
    x = 26,010,717,508.04/219,300.30
  6. Step 6: Final answer
    x = 118,607.76

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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.