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Finding the Fourth Proportional to 65,448.38, 98,172.56 and 21,079.61

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Solution

The fourth proportional to 65,448.38, 98,172.56 and 21,079.61 is: 31,619.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,448.38 : 98,172.56 = 21,079.61 : x
  2. Step 2: Convert to fraction form
    65,448.38/98,172.56 = 21,079.61/x
  3. Step 3: Cross multiply
    65,448.38x = 98,172.56 × 21,079.61
  4. Step 4: Simplify right side
    65,448.38x = 2,069,439,575.63
  5. Step 5: Solve for x
    x = 2,069,439,575.63/65,448.38
  6. Step 6: Final answer
    x = 31,619.42

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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.