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Finding the Fourth Proportional to 124,993.89, 172,491.66 and 68,405.40

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Solution

The fourth proportional to 124,993.89, 172,491.66 and 68,405.40 is: 94,399.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,993.89 : 172,491.66 = 68,405.40 : x
  2. Step 2: Convert to fraction form
    124,993.89/172,491.66 = 68,405.40/x
  3. Step 3: Cross multiply
    124,993.89x = 172,491.66 × 68,405.40
  4. Step 4: Simplify right side
    124,993.89x = 11,799,360,998.96
  5. Step 5: Solve for x
    x = 11,799,360,998.96/124,993.89
  6. Step 6: Final answer
    x = 94,399.50

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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.