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Finding the Fourth Proportional to 65,551.72, 98,316.99 and 21,178.69

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Solution

The fourth proportional to 65,551.72, 98,316.99 and 21,178.69 is: 31,764.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,551.72 : 98,316.99 = 21,178.69 : x
  2. Step 2: Convert to fraction form
    65,551.72/98,316.99 = 21,178.69/x
  3. Step 3: Cross multiply
    65,551.72x = 98,316.99 × 21,178.69
  4. Step 4: Simplify right side
    65,551.72x = 2,082,225,052.94
  5. Step 5: Solve for x
    x = 2,082,225,052.94/65,551.72
  6. Step 6: Final answer
    x = 31,764.61

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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.