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Finding the Fourth Proportional to 139,398.96, 209,203.59 and 64,571.60

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Solution

The fourth proportional to 139,398.96, 209,203.59 and 64,571.60 is: 96,906.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,398.96 : 209,203.59 = 64,571.60 : x
  2. Step 2: Convert to fraction form
    139,398.96/209,203.59 = 64,571.60/x
  3. Step 3: Cross multiply
    139,398.96x = 209,203.59 × 64,571.60
  4. Step 4: Simplify right side
    139,398.96x = 13,508,610,532.04
  5. Step 5: Solve for x
    x = 13,508,610,532.04/139,398.96
  6. Step 6: Final answer
    x = 96,906.11

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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.