Home / 81,103.45-121,655.16-41,638.63

Finding the Fourth Proportional to 81,103.45, 121,655.16 and 41,638.63

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Solution

The fourth proportional to 81,103.45, 121,655.16 and 41,638.63 is: 62,457.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,103.45 : 121,655.16 = 41,638.63 : x
  2. Step 2: Convert to fraction form
    81,103.45/121,655.16 = 41,638.63/x
  3. Step 3: Cross multiply
    81,103.45x = 121,655.16 × 41,638.63
  4. Step 4: Simplify right side
    81,103.45x = 5,065,554,194.83
  5. Step 5: Solve for x
    x = 5,065,554,194.83/81,103.45
  6. Step 6: Final answer
    x = 62,457.94

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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.