Home / 103,420.15-154,966.20-68,318.80

Finding the Fourth Proportional to 103,420.15, 154,966.20 and 68,318.80

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Solution

The fourth proportional to 103,420.15, 154,966.20 and 68,318.80 is: 102,369.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,420.15 : 154,966.20 = 68,318.80 : x
  2. Step 2: Convert to fraction form
    103,420.15/154,966.20 = 68,318.80/x
  3. Step 3: Cross multiply
    103,420.15x = 154,966.20 × 68,318.80
  4. Step 4: Simplify right side
    103,420.15x = 10,587,104,824.56
  5. Step 5: Solve for x
    x = 10,587,104,824.56/103,420.15
  6. Step 6: Final answer
    x = 102,369.85

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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.