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Finding the Fourth Proportional to 87,459.91, 120,673.26 and 49,212

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Solution

The fourth proportional to 87,459.91, 120,673.26 and 49,212 is: 67,900.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,459.91 : 120,673.26 = 49,212 : x
  2. Step 2: Convert to fraction form
    87,459.91/120,673.26 = 49,212/x
  3. Step 3: Cross multiply
    87,459.91x = 120,673.26 × 49,212
  4. Step 4: Simplify right side
    87,459.91x = 5,938,572,471.12
  5. Step 5: Solve for x
    x = 5,938,572,471.12/87,459.91
  6. Step 6: Final answer
    x = 67,900.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.