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Finding the Fourth Proportional to 43,462.80, 65,237.40 and 21,301.20

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Solution

The fourth proportional to 43,462.80, 65,237.40 and 21,301.20 is: 31,972.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,462.80 : 65,237.40 = 21,301.20 : x
  2. Step 2: Convert to fraction form
    43,462.80/65,237.40 = 21,301.20/x
  3. Step 3: Cross multiply
    43,462.80x = 65,237.40 × 21,301.20
  4. Step 4: Simplify right side
    43,462.80x = 1,389,634,904.88
  5. Step 5: Solve for x
    x = 1,389,634,904.88/43,462.80
  6. Step 6: Final answer
    x = 31,972.97

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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.