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Finding the Fourth Proportional to 423,474.94, 635,078.58 and 139,118.80

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Solution

The fourth proportional to 423,474.94, 635,078.58 and 139,118.80 is: 208,634.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,474.94 : 635,078.58 = 139,118.80 : x
  2. Step 2: Convert to fraction form
    423,474.94/635,078.58 = 139,118.80/x
  3. Step 3: Cross multiply
    423,474.94x = 635,078.58 × 139,118.80
  4. Step 4: Simplify right side
    423,474.94x = 88,351,369,955.30
  5. Step 5: Solve for x
    x = 88,351,369,955.30/423,474.94
  6. Step 6: Final answer
    x = 208,634.23

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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.