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Finding the Fourth Proportional to 84,367.89, 126,503.91 and 34,389.45

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Solution

The fourth proportional to 84,367.89, 126,503.91 and 34,389.45 is: 51,564.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,367.89 : 126,503.91 = 34,389.45 : x
  2. Step 2: Convert to fraction form
    84,367.89/126,503.91 = 34,389.45/x
  3. Step 3: Cross multiply
    84,367.89x = 126,503.91 × 34,389.45
  4. Step 4: Simplify right side
    84,367.89x = 4,350,399,887.75
  5. Step 5: Solve for x
    x = 4,350,399,887.75/84,367.89
  6. Step 6: Final answer
    x = 51,564.64

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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.