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Finding the Fourth Proportional to 408,103.88, 612,166.77 and 127,621.13

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Solution

The fourth proportional to 408,103.88, 612,166.77 and 127,621.13 is: 191,435.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,103.88 : 612,166.77 = 127,621.13 : x
  2. Step 2: Convert to fraction form
    408,103.88/612,166.77 = 127,621.13/x
  3. Step 3: Cross multiply
    408,103.88x = 612,166.77 × 127,621.13
  4. Step 4: Simplify right side
    408,103.88x = 78,125,411,875.02
  5. Step 5: Solve for x
    x = 78,125,411,875.02/408,103.88
  6. Step 6: Final answer
    x = 191,435.11

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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.