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Finding the Fourth Proportional to 219,920.96, 329,881.76 and 79,646.72

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Solution

The fourth proportional to 219,920.96, 329,881.76 and 79,646.72 is: 119,470.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,920.96 : 329,881.76 = 79,646.72 : x
  2. Step 2: Convert to fraction form
    219,920.96/329,881.76 = 79,646.72/x
  3. Step 3: Cross multiply
    219,920.96x = 329,881.76 × 79,646.72
  4. Step 4: Simplify right side
    219,920.96x = 26,274,000,171.83
  5. Step 5: Solve for x
    x = 26,274,000,171.83/219,920.96
  6. Step 6: Final answer
    x = 119,470.20

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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.