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Finding the Fourth Proportional to 57,689.40, 86,505.30 and 26,489.40

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Solution

The fourth proportional to 57,689.40, 86,505.30 and 26,489.40 is: 39,720.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,689.40 : 86,505.30 = 26,489.40 : x
  2. Step 2: Convert to fraction form
    57,689.40/86,505.30 = 26,489.40/x
  3. Step 3: Cross multiply
    57,689.40x = 86,505.30 × 26,489.40
  4. Step 4: Simplify right side
    57,689.40x = 2,291,473,493.82
  5. Step 5: Solve for x
    x = 2,291,473,493.82/57,689.40
  6. Step 6: Final answer
    x = 39,720.88

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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.