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Finding the Fourth Proportional to 103,357.43, 154,765.49 and 67,706.63

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Solution

The fourth proportional to 103,357.43, 154,765.49 and 67,706.63 is: 101,382.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,357.43 : 154,765.49 = 67,706.63 : x
  2. Step 2: Convert to fraction form
    103,357.43/154,765.49 = 67,706.63/x
  3. Step 3: Cross multiply
    103,357.43x = 154,765.49 × 67,706.63
  4. Step 4: Simplify right side
    103,357.43x = 10,478,648,655.84
  5. Step 5: Solve for x
    x = 10,478,648,655.84/103,357.43
  6. Step 6: Final answer
    x = 101,382.64

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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.