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Finding the Fourth Proportional to 71,398.56, 106,980.99 and 43,233.30

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Solution

The fourth proportional to 71,398.56, 106,980.99 and 43,233.30 is: 64,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,398.56 : 106,980.99 = 43,233.30 : x
  2. Step 2: Convert to fraction form
    71,398.56/106,980.99 = 43,233.30/x
  3. Step 3: Cross multiply
    71,398.56x = 106,980.99 × 43,233.30
  4. Step 4: Simplify right side
    71,398.56x = 4,625,141,234.97
  5. Step 5: Solve for x
    x = 4,625,141,234.97/71,398.56
  6. Step 6: Final answer
    x = 64,779.19

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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.