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Finding the Fourth Proportional to 103,081.32, 154,359.45 and 67,914.36

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Solution

The fourth proportional to 103,081.32, 154,359.45 and 67,914.36 is: 101,698.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,081.32 : 154,359.45 = 67,914.36 : x
  2. Step 2: Convert to fraction form
    103,081.32/154,359.45 = 67,914.36/x
  3. Step 3: Cross multiply
    103,081.32x = 154,359.45 × 67,914.36
  4. Step 4: Simplify right side
    103,081.32x = 10,483,223,256.70
  5. Step 5: Solve for x
    x = 10,483,223,256.70/103,081.32
  6. Step 6: Final answer
    x = 101,698.57

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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.