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Finding the Fourth Proportional to 43,359.38, 65,038.16 and 19,985.82

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Solution

The fourth proportional to 43,359.38, 65,038.16 and 19,985.82 is: 29,978.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,359.38 : 65,038.16 = 19,985.82 : x
  2. Step 2: Convert to fraction form
    43,359.38/65,038.16 = 19,985.82/x
  3. Step 3: Cross multiply
    43,359.38x = 65,038.16 × 19,985.82
  4. Step 4: Simplify right side
    43,359.38x = 1,299,840,958.89
  5. Step 5: Solve for x
    x = 1,299,840,958.89/43,359.38
  6. Step 6: Final answer
    x = 29,978.31

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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.