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Finding the Fourth Proportional to 408,072.20, 612,108.30 and 127,675.40

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Solution

The fourth proportional to 408,072.20, 612,108.30 and 127,675.40 is: 191,513.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,072.20 : 612,108.30 = 127,675.40 : x
  2. Step 2: Convert to fraction form
    408,072.20/612,108.30 = 127,675.40/x
  3. Step 3: Cross multiply
    408,072.20x = 612,108.30 × 127,675.40
  4. Step 4: Simplify right side
    408,072.20x = 78,151,172,045.82
  5. Step 5: Solve for x
    x = 78,151,172,045.82/408,072.20
  6. Step 6: Final answer
    x = 191,513.10

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1.5x scale

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.