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Finding the Fourth Proportional to 43,356.79, 65,064.75 and 19,983.43

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Solution

The fourth proportional to 43,356.79, 65,064.75 and 19,983.43 is: 29,988.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,356.79 : 65,064.75 = 19,983.43 : x
  2. Step 2: Convert to fraction form
    43,356.79/65,064.75 = 19,983.43/x
  3. Step 3: Cross multiply
    43,356.79x = 65,064.75 × 19,983.43
  4. Step 4: Simplify right side
    43,356.79x = 1,300,216,877.09
  5. Step 5: Solve for x
    x = 1,300,216,877.09/43,356.79
  6. Step 6: Final answer
    x = 29,988.77

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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.