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Finding the Fourth Proportional to 70,920.92, 106,381.73 and 21,001.96

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Solution

The fourth proportional to 70,920.92, 106,381.73 and 21,001.96 is: 31,503.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,920.92 : 106,381.73 = 21,001.96 : x
  2. Step 2: Convert to fraction form
    70,920.92/106,381.73 = 21,001.96/x
  3. Step 3: Cross multiply
    70,920.92x = 106,381.73 × 21,001.96
  4. Step 4: Simplify right side
    70,920.92x = 2,234,224,838.19
  5. Step 5: Solve for x
    x = 2,234,224,838.19/70,920.92
  6. Step 6: Final answer
    x = 31,503.04

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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.