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Finding the Fourth Proportional to 139,662.20, 209,493.30 and 97,671.80

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Solution

The fourth proportional to 139,662.20, 209,493.30 and 97,671.80 is: 146,507.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,662.20 : 209,493.30 = 97,671.80 : x
  2. Step 2: Convert to fraction form
    139,662.20/209,493.30 = 97,671.80/x
  3. Step 3: Cross multiply
    139,662.20x = 209,493.30 × 97,671.80
  4. Step 4: Simplify right side
    139,662.20x = 20,461,587,698.94
  5. Step 5: Solve for x
    x = 20,461,587,698.94/139,662.20
  6. Step 6: Final answer
    x = 146,507.70

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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.