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Finding the Fourth Proportional to 303,042.64, 454,563.72 and 81,426.64

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Solution

The fourth proportional to 303,042.64, 454,563.72 and 81,426.64 is: 122,139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,042.64 : 454,563.72 = 81,426.64 : x
  2. Step 2: Convert to fraction form
    303,042.64/454,563.72 = 81,426.64/x
  3. Step 3: Cross multiply
    303,042.64x = 454,563.72 × 81,426.64
  4. Step 4: Simplify right side
    303,042.64x = 37,013,596,385.50
  5. Step 5: Solve for x
    x = 37,013,596,385.50/303,042.64
  6. Step 6: Final answer
    x = 122,139.90

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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.