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Finding the Fourth Proportional to 330,689.86, 495,981.69 and 90,747.73

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Solution

The fourth proportional to 330,689.86, 495,981.69 and 90,747.73 is: 136,107.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,689.86 : 495,981.69 = 90,747.73 : x
  2. Step 2: Convert to fraction form
    330,689.86/495,981.69 = 90,747.73/x
  3. Step 3: Cross multiply
    330,689.86x = 495,981.69 × 90,747.73
  4. Step 4: Simplify right side
    330,689.86x = 45,009,210,489.30
  5. Step 5: Solve for x
    x = 45,009,210,489.30/330,689.86
  6. Step 6: Final answer
    x = 136,107.02

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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.