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Finding the Fourth Proportional to 423,435.33, 635,091.71 and 139,137.08

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Solution

The fourth proportional to 423,435.33, 635,091.71 and 139,137.08 is: 208,685.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,435.33 : 635,091.71 = 139,137.08 : x
  2. Step 2: Convert to fraction form
    423,435.33/635,091.71 = 139,137.08/x
  3. Step 3: Cross multiply
    423,435.33x = 635,091.71 × 139,137.08
  4. Step 4: Simplify right side
    423,435.33x = 88,364,802,190.46
  5. Step 5: Solve for x
    x = 88,364,802,190.46/423,435.33
  6. Step 6: Final answer
    x = 208,685.47

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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.