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Finding the Fourth Proportional to 130,906.60, 196,359.90 and 121,283.80

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Solution

The fourth proportional to 130,906.60, 196,359.90 and 121,283.80 is: 181,925.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,906.60 : 196,359.90 = 121,283.80 : x
  2. Step 2: Convert to fraction form
    130,906.60/196,359.90 = 121,283.80/x
  3. Step 3: Cross multiply
    130,906.60x = 196,359.90 × 121,283.80
  4. Step 4: Simplify right side
    130,906.60x = 23,815,274,839.62
  5. Step 5: Solve for x
    x = 23,815,274,839.62/130,906.60
  6. Step 6: Final answer
    x = 181,925.70

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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.