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Finding the Fourth Proportional to 43,702.80, 65,554.20 and 20,374.80

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Solution

The fourth proportional to 43,702.80, 65,554.20 and 20,374.80 is: 30,562.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,702.80 : 65,554.20 = 20,374.80 : x
  2. Step 2: Convert to fraction form
    43,702.80/65,554.20 = 20,374.80/x
  3. Step 3: Cross multiply
    43,702.80x = 65,554.20 × 20,374.80
  4. Step 4: Simplify right side
    43,702.80x = 1,335,653,714.16
  5. Step 5: Solve for x
    x = 1,335,653,714.16/43,702.80
  6. Step 6: Final answer
    x = 30,562.20

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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.