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Finding the Fourth Proportional to 423,537.81, 635,172 and 139,162.80

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Solution

The fourth proportional to 423,537.81, 635,172 and 139,162.80 is: 208,699.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,537.81 : 635,172 = 139,162.80 : x
  2. Step 2: Convert to fraction form
    423,537.81/635,172 = 139,162.80/x
  3. Step 3: Cross multiply
    423,537.81x = 635,172 × 139,162.80
  4. Step 4: Simplify right side
    423,537.81x = 88,392,314,001.60
  5. Step 5: Solve for x
    x = 88,392,314,001.60/423,537.81
  6. Step 6: Final answer
    x = 208,699.94

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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.