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Finding the Fourth Proportional to 43,897.20, 65,829.60 and 21,703.20

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Solution

The fourth proportional to 43,897.20, 65,829.60 and 21,703.20 is: 32,546.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,897.20 : 65,829.60 = 21,703.20 : x
  2. Step 2: Convert to fraction form
    43,897.20/65,829.60 = 21,703.20/x
  3. Step 3: Cross multiply
    43,897.20x = 65,829.60 × 21,703.20
  4. Step 4: Simplify right side
    43,897.20x = 1,428,712,974.72
  5. Step 5: Solve for x
    x = 1,428,712,974.72/43,897.20
  6. Step 6: Final answer
    x = 32,546.79

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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.