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Finding the Fourth Proportional to 117,355.50, 161,938.68 and 72,035.39

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Solution

The fourth proportional to 117,355.50, 161,938.68 and 72,035.39 is: 99,401.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,355.50 : 161,938.68 = 72,035.39 : x
  2. Step 2: Convert to fraction form
    117,355.50/161,938.68 = 72,035.39/x
  3. Step 3: Cross multiply
    117,355.50x = 161,938.68 × 72,035.39
  4. Step 4: Simplify right side
    117,355.50x = 11,665,314,800.01
  5. Step 5: Solve for x
    x = 11,665,314,800.01/117,355.50
  6. Step 6: Final answer
    x = 99,401.52

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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.