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Finding the Fourth Proportional to 43,842.72, 65,737.79 and 21,309.02

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Solution

The fourth proportional to 43,842.72, 65,737.79 and 21,309.02 is: 31,950.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,842.72 : 65,737.79 = 21,309.02 : x
  2. Step 2: Convert to fraction form
    43,842.72/65,737.79 = 21,309.02/x
  3. Step 3: Cross multiply
    43,842.72x = 65,737.79 × 21,309.02
  4. Step 4: Simplify right side
    43,842.72x = 1,400,807,985.36
  5. Step 5: Solve for x
    x = 1,400,807,985.36/43,842.72
  6. Step 6: Final answer
    x = 31,950.75

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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.