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Finding the Fourth Proportional to 65,506.80, 98,279.48 and 21,132.72

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Solution

The fourth proportional to 65,506.80, 98,279.48 and 21,132.72 is: 31,705.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,506.80 : 98,279.48 = 21,132.72 : x
  2. Step 2: Convert to fraction form
    65,506.80/98,279.48 = 21,132.72/x
  3. Step 3: Cross multiply
    65,506.80x = 98,279.48 × 21,132.72
  4. Step 4: Simplify right side
    65,506.80x = 2,076,912,732.59
  5. Step 5: Solve for x
    x = 2,076,912,732.59/65,506.80
  6. Step 6: Final answer
    x = 31,705.30

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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.