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Finding the Fourth Proportional to 100,376.64, 150,378.81 and 71,854.71

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Solution

The fourth proportional to 100,376.64, 150,378.81 and 71,854.71 is: 107,648.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,376.64 : 150,378.81 = 71,854.71 : x
  2. Step 2: Convert to fraction form
    100,376.64/150,378.81 = 71,854.71/x
  3. Step 3: Cross multiply
    100,376.64x = 150,378.81 × 71,854.71
  4. Step 4: Simplify right side
    100,376.64x = 10,805,425,782.70
  5. Step 5: Solve for x
    x = 10,805,425,782.70/100,376.64
  6. Step 6: Final answer
    x = 107,648.81

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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.