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Finding the Fourth Proportional to 74,262.69, 111,177.77 and 66,662.87

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Solution

The fourth proportional to 74,262.69, 111,177.77 and 66,662.87 is: 99,800.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,262.69 : 111,177.77 = 66,662.87 : x
  2. Step 2: Convert to fraction form
    74,262.69/111,177.77 = 66,662.87/x
  3. Step 3: Cross multiply
    74,262.69x = 111,177.77 × 66,662.87
  4. Step 4: Simplify right side
    74,262.69x = 7,411,428,339.20
  5. Step 5: Solve for x
    x = 7,411,428,339.20/74,262.69
  6. Step 6: Final answer
    x = 99,800.16

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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.