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Finding the Fourth Proportional to 65,390.92, 98,063.32 and 21,002.68

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Solution

The fourth proportional to 65,390.92, 98,063.32 and 21,002.68 is: 31,496.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,390.92 : 98,063.32 = 21,002.68 : x
  2. Step 2: Convert to fraction form
    65,390.92/98,063.32 = 21,002.68/x
  3. Step 3: Cross multiply
    65,390.92x = 98,063.32 × 21,002.68
  4. Step 4: Simplify right side
    65,390.92x = 2,059,592,529.70
  5. Step 5: Solve for x
    x = 2,059,592,529.70/65,390.92
  6. Step 6: Final answer
    x = 31,496.61

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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.