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Finding the Fourth Proportional to 421,373.09, 632,078.09 and 121,883.94

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Solution

The fourth proportional to 421,373.09, 632,078.09 and 121,883.94 is: 182,831.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,373.09 : 632,078.09 = 121,883.94 : x
  2. Step 2: Convert to fraction form
    421,373.09/632,078.09 = 121,883.94/x
  3. Step 3: Cross multiply
    421,373.09x = 632,078.09 × 121,883.94
  4. Step 4: Simplify right side
    421,373.09x = 77,040,167,996.87
  5. Step 5: Solve for x
    x = 77,040,167,996.87/421,373.09
  6. Step 6: Final answer
    x = 182,831.25

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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.