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Finding the Fourth Proportional to 153,564.62, 211,914.05 and 89,035.07

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Solution

The fourth proportional to 153,564.62, 211,914.05 and 89,035.07 is: 122,865.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,564.62 : 211,914.05 = 89,035.07 : x
  2. Step 2: Convert to fraction form
    153,564.62/211,914.05 = 89,035.07/x
  3. Step 3: Cross multiply
    153,564.62x = 211,914.05 × 89,035.07
  4. Step 4: Simplify right side
    153,564.62x = 18,867,780,770.99
  5. Step 5: Solve for x
    x = 18,867,780,770.99/153,564.62
  6. Step 6: Final answer
    x = 122,865.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.