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Finding the Fourth Proportional to 330,005.10, 495,007.65 and 80,687.10

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Solution

The fourth proportional to 330,005.10, 495,007.65 and 80,687.10 is: 121,030.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,005.10 : 495,007.65 = 80,687.10 : x
  2. Step 2: Convert to fraction form
    330,005.10/495,007.65 = 80,687.10/x
  3. Step 3: Cross multiply
    330,005.10x = 495,007.65 × 80,687.10
  4. Step 4: Simplify right side
    330,005.10x = 39,940,731,756.32
  5. Step 5: Solve for x
    x = 39,940,731,756.32/330,005.10
  6. Step 6: Final answer
    x = 121,030.65

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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.