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Finding the Fourth Proportional to 43,575.80, 65,363.70 and 21,403.40

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Solution

The fourth proportional to 43,575.80, 65,363.70 and 21,403.40 is: 32,105.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,575.80 : 65,363.70 = 21,403.40 : x
  2. Step 2: Convert to fraction form
    43,575.80/65,363.70 = 21,403.40/x
  3. Step 3: Cross multiply
    43,575.80x = 65,363.70 × 21,403.40
  4. Step 4: Simplify right side
    43,575.80x = 1,399,005,416.58
  5. Step 5: Solve for x
    x = 1,399,005,416.58/43,575.80
  6. Step 6: Final answer
    x = 32,105.10

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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.