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Finding the Fourth Proportional to 139,937.20, 209,905.80 and 132,355.60

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Solution

The fourth proportional to 139,937.20, 209,905.80 and 132,355.60 is: 198,533.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,937.20 : 209,905.80 = 132,355.60 : x
  2. Step 2: Convert to fraction form
    139,937.20/209,905.80 = 132,355.60/x
  3. Step 3: Cross multiply
    139,937.20x = 209,905.80 × 132,355.60
  4. Step 4: Simplify right side
    139,937.20x = 27,782,208,102.48
  5. Step 5: Solve for x
    x = 27,782,208,102.48/139,937.20
  6. Step 6: Final answer
    x = 198,533.40

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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.