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Finding the Fourth Proportional to 219,168.72, 328,771.80 and 77,001.57

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Solution

The fourth proportional to 219,168.72, 328,771.80 and 77,001.57 is: 115,508.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,168.72 : 328,771.80 = 77,001.57 : x
  2. Step 2: Convert to fraction form
    219,168.72/328,771.80 = 77,001.57/x
  3. Step 3: Cross multiply
    219,168.72x = 328,771.80 × 77,001.57
  4. Step 4: Simplify right side
    219,168.72x = 25,315,944,771.73
  5. Step 5: Solve for x
    x = 25,315,944,771.73/219,168.72
  6. Step 6: Final answer
    x = 115,508.93

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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.