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Finding the Fourth Proportional to 330,573.81, 495,821.74 and 90,711.97

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Solution

The fourth proportional to 330,573.81, 495,821.74 and 90,711.97 is: 136,057.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,573.81 : 495,821.74 = 90,711.97 : x
  2. Step 2: Convert to fraction form
    330,573.81/495,821.74 = 90,711.97/x
  3. Step 3: Cross multiply
    330,573.81x = 495,821.74 × 90,711.97
  4. Step 4: Simplify right side
    330,573.81x = 44,976,965,507.98
  5. Step 5: Solve for x
    x = 44,976,965,507.98/330,573.81
  6. Step 6: Final answer
    x = 136,057.25

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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.